Is every number in the student's list valid?
", "definition": "if(all(map(not isnan(x),x,interpreted_answer)),\n true,\n let(index,filter(isnan(interpreted_answer[x]),x,0..len(interpreted_answer)-1)[0], wrong, bits[index],\n warn(wrong+\" is not a valid number\");\n fail(wrong+\" is not a valid number.\")\n )\n )"}, {"name": "is_sorted", "description": "Are the student's answers in ascending order?
", "definition": "assert(sort(interpreted_answer)=interpreted_answer,\n multiply_credit(0.5,\"Not in order\")\n )"}, {"name": "included", "description": "Is each number in the expected answer present in the student's list the correct number of times?
", "definition": "map(\n let(\n num_student,len(filter(x=y,y,interpreted_answer)),\n num_expected,len(filter(x=y,y,expected_numbers)),\n switch(\n num_student=num_expected,\n true,\n num_studentTrue if the student's list doesn't contain any numbers that aren't in the expected answer.
", "definition": "if(all(map(x in expected_numbers, x, interpreted_answer)),\n true\n ,\n incorrect(\"Your answer contains \"+extra_numbers[0]+\" but should not.\");\n false\n )"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "if(lower(studentAnswer) in [\"empty\",\"\u2205\"],[],\n map(\n if(settings[\"allowFractions\"],parsenumber_or_fraction(x,notationStyles), parsenumber(x,notationStyles))\n ,x\n ,bits\n )\n)"}, {"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(studentanswer=\"\",fail(\"You have not entered an answer\"),false);\napply(valid_numbers);\napply(included);\napply(no_extras);\ncorrectif(all_included and no_extras)"}, {"name": "notationStyles", "description": "", "definition": "[\"en\"]"}, {"name": "isSet", "description": "Should the answer be considered as a set, so the number of times an element occurs doesn't matter?
", "definition": "settings[\"isSet\"]"}, {"name": "extra_numbers", "description": "Numbers included in the student's answer that are not in the expected list.
", "definition": "filter(not (x in expected_numbers),x,interpreted_answer)"}], "settings": [{"name": "correctAnswer", "label": "Correct answer", "help_url": "", "hint": "The list of numbers that the student should enter. The order does not matter.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "allowFractions", "label": "Allow the student to enter fractions?", "help_url": "", "hint": "", "input_type": "checkbox", "default_value": false}, {"name": "correctAnswerFractions", "label": "Display the correct answers as fractions?", "help_url": "", "hint": "", "input_type": "checkbox", "default_value": false}, {"name": "isSet", "label": "Is the answer a set?", "help_url": "", "hint": "If ticked, the number of times an element occurs doesn't matter, only whether it's included at all.", "input_type": "checkbox", "default_value": false}, {"name": "show_input_hint", "label": "Show the input hint?", "help_url": "", "hint": "", "input_type": "checkbox", "default_value": true}, {"name": "separator", "label": "Separator", "help_url": "", "hint": "The substring that should separate items in the student's list", "input_type": "string", "default_value": ",", "subvars": false}], "public_availability": "always", "published": true, "extensions": []}, {"source": {"pk": 1, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/1/edit"}, "name": "Yes/no", "short_name": "yes-no", "description": "The student is shown two radio choices: \"Yes\" and \"No\". One of them is correct.
", "help_url": "", "input_widget": "radios", "input_options": {"correctAnswer": "if(eval(settings[\"correct_answer_expr\"]), 0, 1)", "hint": {"static": true, "value": ""}, "choices": {"static": true, "value": ["Yes", "No"]}}, "can_be_gap": true, "can_be_step": true, "marking_script": "mark:\nif(studentanswer=correct_answer,\n correct(),\n incorrect()\n)\n\ninterpreted_answer:\nstudentAnswer=0\n\ncorrect_answer:\nif(eval(settings[\"correct_answer_expr\"]),0,1)", "marking_notes": [{"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(studentanswer=correct_answer,\n correct(),\n incorrect()\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer=0"}, {"name": "correct_answer", "description": "", "definition": "if(eval(settings[\"correct_answer_expr\"]),0,1)"}], "settings": [{"name": "correct_answer_expr", "label": "Is the answer \"Yes\"?", "help_url": "", "hint": "An expression which evaluates totrue or false.", "input_type": "mathematical_expression", "default_value": "true", "subvars": false}], "public_availability": "always", "published": true, "extensions": []}], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}], "tags": [], "metadata": {"description": "A demo of some custom part types.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "Custom part types make it easy to re-use non-standard marking algorithms. A custom part type consists of a list of settings in the editor, an input widget, and a marking algorithm.
\nSee this question on the public editor.
", "advice": "", "rulesets": {}, "variables": {}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": [], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "yes-no", "useCustomName": true, "customName": "Yes/no", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "This part type makes it easy to set up answers where the answer is either \"yes\" or \"no\". The question author specifies which choice is correct, and the student is awarded full credit if they choose the right answer. You could achieve the same thing with a \"choose one from a list\" part, but it would take longer to set up.
\nIs 7 a prime number?
", "settings": {"correct_answer_expr": "true"}}, {"type": "give-a-numerical-input-for-an-expression", "useCustomName": true, "customName": "Give a numerical input for an expression", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "This part type asks the student to write a numerical value which, when substituted into a mathematical expression, produces the desired value. The author provides the expression and the target value.
\nFind a number $x$ such that $x^2-5x+13 = 7$.
\nTry 1, 2 and 3.
This part type asks the student for a list of numbers. The question author gives a list of numbers to expect. The student's answer is correct if it includes every item in the expected list the same number of times, and nothing else. The order doesn't matter.
List the factors of 15.
\nTry 1,3,5,15 and 1,3,5,10,15.
A demonstration of embedding various kinds of media in a question.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "You can include all sorts of images, videos and interactive diagrams in Numbas questions.
\nSee this question in the public editor.
", "advice": "", "rulesets": {"std": ["all", "fractionNumbers", "!collectNumbers", "!noLeadingMinus"]}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"mh": {"name": "mh", "group": "JSXGraph part", "definition": "precround(V^2/(2*g),2)", "description": "", "templateType": "anything", "can_override": false}, "t1": {"name": "t1", "group": "JSXGraph part", "definition": "precround(t,2)", "description": "", "templateType": "anything", "can_override": false}, "t": {"name": "t", "group": "JSXGraph part", "definition": "V/g", "description": "", "templateType": "anything", "can_override": false}, "v": {"name": "v", "group": "JSXGraph part", "definition": "random(50..100)", "description": "", "templateType": "anything", "can_override": false}, "g": {"name": "g", "group": "JSXGraph part", "definition": "9.81", "description": "", "templateType": "anything", "can_override": false}, "n1": {"name": "n1", "group": "SVG part", "definition": "random(1..99)", "description": "", "templateType": "anything", "can_override": false}, "n2": {"name": "n2", "group": "SVG part", "definition": "random(1..99)", "description": "", "templateType": "anything", "can_override": false}, "n3": {"name": "n3", "group": "SVG part", "definition": "random(1..99)", "description": "", "templateType": "anything", "can_override": false}, "point_a": {"name": "point_a", "group": "GeoGebra part", "definition": "vector(random(0..2#0.1),random(0..2#0.1))", "description": "", "templateType": "anything", "can_override": false}, "point_b": {"name": "point_b", "group": "GeoGebra part", "definition": "vector(random(2..4#0.1),random(2..4#0.1))", "description": "", "templateType": "anything", "can_override": false}, "euk_diagram": {"name": "euk_diagram", "group": "Eukleides part", "definition": "eukleides(\"An angle in a circle\",let(\n a, point(0,0),\n r, 2,\n b, point(r*cos(turn), r*sin(turn)),\n c, point(r*cos(angle+turn), r*sin(angle+turn)),\n [\n circle(a,r) dashed,\n b..a..c open,\n angle(b,a,c),\n center(c..b) label(dpformat(degrees(angle),0)+\"\u00b0\",rad(angle/2+turn),0.15),\n a,\n b color1 draggable(\"B\"),\n c color2 draggable(\"C\",[\"angle\"])\n ]\n),[\"angle\":pi/6,\"turn\":0])", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": "100"}, "ungrouped_variables": [], "variable_groups": [{"name": "SVG part", "variables": ["n1", "n2", "n3"]}, {"name": "JSXGraph part", "variables": ["g", "mh", "t", "t1", "v"]}, {"name": "GeoGebra part", "variables": ["point_a", "point_b"]}, {"name": "Eukleides part", "variables": ["euk_diagram"]}], "functions": {"graphsolution": {"parameters": [], "type": "html", "language": "javascript", "definition": "var variables = question.unwrappedVariables;\nvar v = variables.v;\nvar mh = variables.mh;\nvar t = variables.t;\nvar g = variables.g;\n\nvar div = Numbas.extensions.jsxgraph.makeBoard('400px','400px',\n {boundingBox:[-3,mh+10,2*t+2,-50],\n axis:false,\n showNavigation:false,\n grid:false});\nvar brd = div.board; \n\nbrd.create('axis',[[0,0],[1,0]], {\n ticks: {\n drawLabels: true,\n label: {offset: [-5, -10]},\n minorTicks: 0\n }\n});\nbrd.create('axis',[[0,0],[0,1]], {\n ticks: {\n drawLabels: true,\n label: {offset: [-30, 0]},\n minorTicks: 0\n }\n});\nvar origin = brd.create('point',[0,0],{fixed:true,name:'',size:1});\nvar tangent = brd.create('line',[origin,[1,v]],{fixed:true,name:'',dash:2});\n\nvar student_formula;\n//create a functiongraph from the student input\nfunction userf(t){\n if(student_formula) {\n try {\n //the user input is evaluated at x=t\n var val = scope.evaluate(student_formula,{t:t});\n if(!jme.isType(val,'number')) {\n return 0;\n } else {\n return jme.castToType(val,'number').value;\n }\n }\n catch(e) {\n return 0;\n }\n }\n else\n return 0;\n}\nvar student_curve = brd.create('functiongraph',[userf,0,2*t],{strokeColor:'red',strokeWidth:2});\n\n//pick up the student answer and parse it\nquestion.signals.on('HTMLAttached',function() {\n var part = question.parts[2].gaps[0];\n \n ko.computed(function(){\n var expr = part.display.studentAnswer();\n try {\n student_formula = Numbas.jme.compile(expr);\n }\n catch(e) {\n student_formula = null;\n }\n student_curve.updateCurve();\n\n brd.update();\n });\n}); \n\nreturn div;"}}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": true, "customName": "Images", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "It's easy to include an image to illustrate your question, or just liven it up.
\n![\"A](\"resources/question-resources/Numbat_Face_U5OjlWd.jpg\")
Diagrams in SVG format are drawn using vectors, so don't become blurry when scaled up.
\n![\"Some](\"resources/question-resources/random-numbers_1yehVZF.svg\")
JSXGraph is a package for creating geometric diagrams and charts. You create diagrams using JavaScript code. Question variables can be used to randomise elements of the diagram, and answers to question parts can be linked to elements of the diagram.
\n{graphsolution()}
\nWrite a formula for the height $y$ at time $t$ of a projectile launched upwards with a speed of {v} m/s.
\n$y=$ [[0]]
\nYour formula is plotted in the graph above. The vertical axis represents $y$ and the horizontal axis represents $t$.
", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "alternatives": [{"type": "jme", "useCustomName": true, "customName": "Raw value of g", "marks": "1", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "alternativeFeedbackMessage": "", "useAlternativeFeedback": true, "answer": "{v}t-1/2{g}*t^2", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": true, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": [{"name": "t", "value": ""}]}], "answer": "{v}t-1/2g*t^2", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": true, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": [{"name": "g", "value": ""}, {"name": "t", "value": ""}]}], "sortAnswers": false}, {"type": "information", "useCustomName": true, "customName": "GeoGebra", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "GeoGebra is an easy-to-use dynamic geometry package. You create diagrams using a graphical interface. Question variables can be used to randomise the elements of a diagram.
\n{geogebra_applet(\"dw4n67kf\")}
"}, {"type": "information", "useCustomName": true, "customName": "Eukleides", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "The Eukleides extension provides a way of creating diagrams inside Numbas. Diagrams can be drawn based on question variables, and elements can be made draggable or animated.
\n{max_width(30,euk_diagram)}
"}, {"type": "information", "useCustomName": true, "customName": "Video", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "You can easily embed videos.
\n"}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}]}, {"name": "Randomisation", "pickingStrategy": "all-ordered", "pickQuestions": 1, "questionNames": [""], "variable_overrides": [[]], "questions": [{"name": "Numbas demo: Randomisation", "extensions": ["random_person"], "custom_part_types": [], "resources": [["question-resources/numbas-randomised-prices_PqUkZL7.svg", "/srv/numbas/media/question-resources/numbas-randomised-prices_PqUkZL7.svg"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}], "tags": [], "metadata": {"description": "Demonstration of randomisation: many elements in this question are randomised. The names of the products and clients are randomly chosen, as are the prices and order amounts.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "Numbas can randomise every element of a question. In this question, the names of the products and people are randomly chosen, as well as the prices and order amounts.
\nSee this question in the public editor.
\n\n
The Newcastle Calculating Machines Emporium sells a variety of devices for performing calculations. Their two most popular products are {name_x} and {name_y}.
", "advice": "a)
\nThe formula for the total cost of an order is
\n\\[ \\simplify{{price_x}*{initial_x} + {price_y}*{initial_y}} \\]
\nb)
\nThe order totals are as follows:
\n{table(zip(names,total_costs),[\"Client\",\"Order total (£)\"])}
", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"num_people": {"name": "num_people", "group": "Ungrouped variables", "definition": "5", "description": "", "templateType": "anything", "can_override": false}, "price_x, price_y": {"name": "price_x, price_y", "group": "Ungrouped variables", "definition": "shuffle(2..6)", "description": "The prices of the products. They are never equal.
", "templateType": "anything", "can_override": false}, "orders": {"name": "orders", "group": "Ungrouped variables", "definition": "repeat(shuffle(0..10)[0..2],num_people)", "description": "For each person, how much of each product they ordered. Each quantity is distinct
", "templateType": "anything", "can_override": false}, "all_product_names": {"name": "all_product_names", "group": "Ungrouped variables", "definition": "[ \"Calculon\", \"Subtractrix\", \"Addios\", \"Factroid\", \"Plustre\" ]", "description": "Possible product names. They each start with a different letter.
", "templateType": "list of strings", "can_override": false}, "total_costs": {"name": "total_costs", "group": "Ungrouped variables", "definition": "map(\n eval(cost_formula,dict([[string(initial_x),x],[string(initial_y),y]])),\n [x,y],\n orders\n)", "description": "The total cost of each person's order.
", "templateType": "anything", "can_override": false}, "name_x, name_y": {"name": "name_x, name_y", "group": "Ungrouped variables", "definition": "shuffle(all_product_names)", "description": "The names of the two products.
", "templateType": "anything", "can_override": false}, "order_table_data": {"name": "order_table_data", "group": "Ungrouped variables", "definition": "map([name]+order,[name,order],zip(names,orders))", "description": "The data for the table: the person's name, then the quantities of each product ordered.
", "templateType": "anything", "can_override": false}, "names": {"name": "names", "group": "Ungrouped variables", "definition": "map(p[\"name\"],p,random_people_with_different_initials(num_people))", "description": "Names for the people. They each start with a different letter.
", "templateType": "anything", "can_override": false}, "initial_x,initial_y": {"name": "initial_x,initial_y", "group": "Ungrouped variables", "definition": "map(name(lower(name[0])),name,[name_x,name_y])", "description": "Variable names to use for the two products.
", "templateType": "anything", "can_override": false}, "cost_formula": {"name": "cost_formula", "group": "Ungrouped variables", "definition": "substitute([\"price_x\":price_x, \"price_y\": price_y, \"x\": initial_x, \"y\": initial_y],expression(\"price_x * x + price_y*y\"))", "description": "The formula for the total cost of an order.
", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["price_x, price_y", "name_x, name_y", "initial_x,initial_y", "num_people", "names", "orders", "order_table_data", "all_product_names", "cost_formula", "total_costs"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Here is a page from the Emporium's latest catalogue:
\n![\"{name_x}:](\"resources/question-resources/numbas-randomised-prices_PqUkZL7.svg\")
Write a formula for the total cost of an order of $\\var{initial_x}$ {name_x} units and $\\var{initial_y}$ {name_y} units.
\nTotal cost = [[0]]
", "gaps": [{"type": "jme", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{price_x}*{initial_x} + {price_y}*{initial_y}", "showPreview": true, "checkingType": "absdiff", "checkingAccuracy": 0.001, "failureRate": 1, "vsetRangePoints": 5, "vsetRange": [0, 1], "checkVariableNames": false, "singleLetterVariables": false, "allowUnknownFunctions": true, "implicitFunctionComposition": false, "caseSensitive": false, "valuegenerators": []}], "sortAnswers": false}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "The last 5 orders from the Newcastle Calculating Machines Emporium are shown below.
\n{table(order_table_data,[\"Client\",name_x,name_y])}
"}, {"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Calculate the total cost of each order.
\n| Client | \nOrder total (£) | \n
|---|---|
| {names[0]} | \n[[0]] | \n
| {names[1]} | \n[[1]] | \n
| {names[2]} | \n[[2]] | \n
| {names[3]} | \n[[3]] | \n
| {names[4]} | \n[[4]] | \n
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "
The \"Alternative answers\" feature allows you to set up copies of a part, with different expected answers or settings. Each alternative can award a different number of marks. When the student submits an answer, the alternative that gives the most marks is used, and a feedback message corresponding to that alternative is shown.
\nIn this question, alternate versions accept ever-wider ranges of numbers around the correct answer, awarding fewer marks for less-precise answers.
\nSee this question in the public editor.
", "advice": "", "rulesets": {}, "variables": {"a": {"name": "a", "group": "Ungrouped variables", "definition": "random(1001 .. 8888#1)", "description": "", "templateType": "randrange"}, "b": {"name": "b", "group": "Ungrouped variables", "definition": "random(1001..9999-a)", "description": "", "templateType": "anything"}, "total": {"name": "total", "group": "Ungrouped variables", "definition": "a+b", "description": "", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["a", "b", "total"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "numberentry", "useCustomName": true, "customName": "Add two numbers", "marks": "5", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Calculate $\\var{a} + \\var{b}$.
\n(Try getting the answer slightly wrong: you're awarded more marks the closer you get to the correct answer.)
", "alternatives": [{"type": "numberentry", "useCustomName": true, "customName": "Within 10", "marks": "4", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "alternativeFeedbackMessage": "You're within 10 of the correct answer.
", "useAlternativeFeedback": false, "minValue": "total-10", "maxValue": "total+10", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "numberentry", "useCustomName": true, "customName": "Within 100", "marks": "3", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "alternativeFeedbackMessage": "You're within 100 of the correct answer.
", "useAlternativeFeedback": false, "minValue": "total-100", "maxValue": "total+100", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "numberentry", "useCustomName": true, "customName": "Within 1000", "marks": "1", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "alternativeFeedbackMessage": "You're within 1000 of the correct answer.
", "useAlternativeFeedback": false, "minValue": "total-1000", "maxValue": "total+1000", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "minValue": "total", "maxValue": "total", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}]}, {"name": "Explore mode", "pickingStrategy": "all-ordered", "pickQuestions": "1", "questionNames": ["Design a probability experiment"], "variable_overrides": [[]], "questions": [{"name": "Numbas demo: explore mode", "extensions": ["stats"], "custom_part_types": [{"source": {"pk": 1, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/1/edit"}, "name": "Yes/no", "short_name": "yes-no", "description": "The student is shown two radio choices: \"Yes\" and \"No\". One of them is correct.
", "help_url": "", "input_widget": "radios", "input_options": {"correctAnswer": "if(eval(settings[\"correct_answer_expr\"]), 0, 1)", "hint": {"static": true, "value": ""}, "choices": {"static": true, "value": ["Yes", "No"]}}, "can_be_gap": true, "can_be_step": true, "marking_script": "mark:\nif(studentanswer=correct_answer,\n correct(),\n incorrect()\n)\n\ninterpreted_answer:\nstudentAnswer=0\n\ncorrect_answer:\nif(eval(settings[\"correct_answer_expr\"]),0,1)", "marking_notes": [{"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(studentanswer=correct_answer,\n correct(),\n incorrect()\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer=0"}, {"name": "correct_answer", "description": "", "definition": "if(eval(settings[\"correct_answer_expr\"]),0,1)"}], "settings": [{"name": "correct_answer_expr", "label": "Is the answer \"Yes\"?", "help_url": "", "hint": "An expression which evaluates totrue or false.", "input_type": "mathematical_expression", "default_value": "true", "subvars": false}], "public_availability": "always", "published": true, "extensions": []}], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "http://localhost:8000/accounts/profile/1/"}, {"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Chris Graham", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/369/"}, {"name": "Laura Midgley", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/18287/"}], "tags": [], "metadata": {"description": "An interactive experiment about probability: the student must first 'design' the experiment by deciding how many times they're going to flip a coin, and define what number of heads would make them believe the coin is biased. They must then enter the results of their coin flips, calculate the percentage of heads, and finally decide if the coin is biased, using the condition they specified in the design stage. There are optional hints at each stage.", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "
Explore mode makes it possible to create open-ended questions, where the student is free to choose their own path.
\nIn this question, the student is guided through the steps of designing a probability experiment, and then assessed based on the criteria they chose.
\nSee this question in the public editor.
", "advice": "", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"flips": {"name": "flips", "group": "Ungrouped variables", "definition": "parse_flips_jme(flips_string)", "description": "", "templateType": "anything", "can_override": false}, "flips_string": {"name": "flips_string", "group": "Ungrouped variables", "definition": "join(repeat(random(\"h\",\"t\"),num_flips),\" \")", "description": "", "templateType": "anything", "can_override": false}, "num_flips": {"name": "num_flips", "group": "Ungrouped variables", "definition": "100", "description": "", "templateType": "anything", "can_override": false}, "num_heads": {"name": "num_heads", "group": "Ungrouped variables", "definition": "len(filter(x,x,flips))", "description": "", "templateType": "anything", "can_override": false}, "num_tails": {"name": "num_tails", "group": "Ungrouped variables", "definition": "len(flips)-num_heads", "description": "", "templateType": "anything", "can_override": false}, "percent_heads": {"name": "percent_heads", "group": "Ungrouped variables", "definition": "100*num_heads/len(flips)", "description": "", "templateType": "anything", "can_override": false}, "cleaned_flips_string": {"name": "cleaned_flips_string", "group": "Ungrouped variables", "definition": "join(map(if(x,\"H\",\"T\"),x,flips),\" \")", "description": "", "templateType": "anything", "can_override": false}, "critical_number": {"name": "critical_number", "group": "Ungrouped variables", "definition": "max(raw_critical_number, num_flips-raw_critical_number)", "description": "", "templateType": "anything", "can_override": false}, "is_biased": {"name": "is_biased", "group": "Ungrouped variables", "definition": "num_heads>=critical_number or num_tails>=critical_number", "description": "", "templateType": "anything", "can_override": false}, "raw_critical_number": {"name": "raw_critical_number", "group": "Ungrouped variables", "definition": "60", "description": "", "templateType": "anything", "can_override": false}, "critical_likelihood": {"name": "critical_likelihood", "group": "Ungrouped variables", "definition": "critical_number/num_flips", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["num_flips", "raw_critical_number", "critical_number", "flips_string", "flips", "num_heads", "num_tails", "percent_heads", "cleaned_flips_string", "is_biased", "critical_likelihood"], "variable_groups": [], "functions": {"parse_flips": {"parameters": [["s", "string"]], "type": "list", "language": "javascript", "definition": "s = s.toLowerCase().replace(/[^ht]/g,'');\nreturn s.split('').map(function(c) { return new Numbas.jme.types.TBool(c=='h'); });"}, "parse_flips_jme": {"parameters": [["s", "string"]], "type": "list", "language": "jme", "definition": "map(c='h',c,split(s,' '))"}}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": true, "customName": "Introduction", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [{"label": "Decide number of flips", "rawLabel": "", "otherPart": 1, "variableReplacements": [], "availabilityCondition": "", "penalty": "", "penaltyAmount": 0, "showPenaltyHint": true, "lockAfterLeaving": false}], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "In this exercise you will decide if a coin is biased by flipping it repeatedly and deciding if it lands heads more often than you'd expect.
"}, {"type": "numberentry", "useCustomName": true, "customName": "Decide number of flips", "marks": "1", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": false, "showFeedbackIcon": false, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [{"label": "Define 'biased'", "rawLabel": "", "otherPart": 2, "variableReplacements": [{"variable": "num_flips", "definition": "interpreted_answer"}], "availabilityCondition": "answered", "penalty": "", "penaltyAmount": 0, "showPenaltyHint": true, "lockAfterLeaving": false}], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": "Design the experiment", "prompt": "How many times will you flip your coin?
", "minValue": "1", "maxValue": "infinity", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "numberentry", "useCustomName": true, "customName": "Define 'biased'", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": false, "showFeedbackIcon": false, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [{"label": "Enter data", "rawLabel": "", "otherPart": 4, "variableReplacements": [{"variable": "raw_critical_number", "definition": "interpreted_answer"}], "availabilityCondition": "answered and credit=1", "penalty": "", "penaltyAmount": 0, "showPenaltyHint": true, "lockAfterLeaving": false}, {"label": "What do you expect an unbiased coin do?", "rawLabel": "", "otherPart": 3, "variableReplacements": [], "availabilityCondition": "not (answered or credit=1)", "penalty": "", "penaltyAmount": 0, "showPenaltyHint": true, "lockAfterLeaving": false}], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": "Design the experiment", "prompt": "How many heads would make you think the coin is biased?
", "minValue": "0", "maxValue": "100", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "numberentry", "useCustomName": true, "customName": "What do you expect an unbiased coin do?", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": true, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "With an unbiased coin, how many flips would you expect to land heads up?
", "minValue": "num_flips/2-0.5", "maxValue": "num_flips/2+0.5", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "patternmatch", "useCustomName": true, "customName": "Enter data", "marks": "1", "scripts": {}, "customMarkingAlgorithm": "right_length:\n if(len(parse_flips(studentAnswer))=num_flips,\n correct(\"You have entered your data correctly.\"),\n incorrect(\"You have not entered the right number of flips.\")\n )\n\nmark:\n apply(right_length)\n", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": false, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [{"label": "Calculate proportion of heads", "rawLabel": "", "otherPart": 5, "variableReplacements": [{"variable": "flips_string", "definition": "interpreted_answer"}], "availabilityCondition": "answered", "penalty": "", "penaltyAmount": 0, "showPenaltyHint": true, "lockAfterLeaving": false}], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": "Enter data", "prompt": "Flip the coin {num_flips} times. Each time it lands heads, write an H in the box below. Each time it lands tails, write a T.
", "answer": "[, hHtT]*", "displayAnswer": "", "matchMode": "regex"}, {"type": "numberentry", "useCustomName": true, "customName": "Calculate proportion of heads", "marks": "2", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [{"label": "Show frequencies of heads and tails", "rawLabel": "", "otherPart": 6, "variableReplacements": [], "availabilityCondition": "not (answered and credit=1)", "penalty": "Showed frequencies of heads and tails", "penaltyAmount": "1", "showPenaltyHint": true, "lockAfterLeaving": false}, {"label": "Is the coin biased?", "rawLabel": "", "otherPart": 7, "variableReplacements": [], "availabilityCondition": "answered", "penalty": "", "penaltyAmount": 0, "showPenaltyHint": true, "lockAfterLeaving": false}], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": "Calculate proportion of heads", "prompt": "Your flips were:
\n{cleaned_flips_string}
\nWhat percentage of the flips landed heads?
", "minValue": "percent_heads", "maxValue": "percent_heads", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "precisionType": "dp", "precision": 0, "precisionPartialCredit": 0, "precisionMessage": "You have not given your answer to the correct precision.", "strictPrecision": false, "showPrecisionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "information", "useCustomName": true, "customName": "Show frequencies of heads and tails", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": true, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "| Result | \nHeads | \nTails | \n
| Frequency | \n{num_heads} | \n{num_tails} | \n
Do you think your coin is biased?
", "settings": {"correct_answer_expr": "is_biased"}}, {"type": "numberentry", "useCustomName": true, "customName": "Calculate the critical likelihood", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": true, "adaptiveMarkingPenalty": 0, "exploreObjective": "Decide if the coin is biased", "prompt": "You said that a coin is biased if it comes up heads at least {critical_number} times out of {num_flips}. What's that as a percentage?
", "minValue": "100*critical_likelihood", "maxValue": "100*critical_likelihood", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "precisionType": "dp", "precision": 0, "precisionPartialCredit": "100", "precisionMessage": "", "strictPrecision": false, "showPrecisionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "partsMode": "explore", "maxMarks": 0, "objectives": [{"name": "Calculate proportion of heads", "limit": "2"}, {"name": "Decide if the coin is biased", "limit": "5"}, {"name": "Design the experiment", "limit": "2"}, {"name": "Enter data", "limit": "1"}], "penalties": [{"name": "Showed frequencies of heads and tails", "limit": "1"}, {"name": "Hint about critical likelihood", "limit": "1"}], "objectiveVisibility": "when-active", "penaltyVisibility": "when-active"}]}, {"name": "Adaptive marking", "pickingStrategy": "all-ordered", "pickQuestions": "1", "questionNames": ["Account for an incorrect answer earlier in the question", "Use data provided by the student in later parts"], "variable_overrides": [[], []], "questions": [{"name": "Numbas demo: adaptive marking", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}], "tags": [], "metadata": {"description": "Demonstration of adaptive marking: the student must first add up the number of apples to buy, then work out how much that would cost. Adaptive marking carries an incorrect number of apples into the cost calculation.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "Adaptive marking allows you to apply 'error-carried-forward' marking, or to base the answers for a question on data entered by the student at the start.
\nIn this question, adaptive marking can use the number of apples the student gives in the first part to work out the total cost in the second part.
\nSee this question in the public editor.
", "advice": "", "rulesets": {}, "variables": {"apples_to_buy": {"name": "apples_to_buy", "group": "Ungrouped variables", "definition": "a_apples + b_apples", "description": "", "templateType": "anything"}, "a_apples": {"name": "a_apples", "group": "Ungrouped variables", "definition": "random(2 .. 5#1)", "description": "", "templateType": "randrange"}, "b_apples": {"name": "b_apples", "group": "Ungrouped variables", "definition": "random(2 .. 5#1)", "description": "", "templateType": "randrange"}, "cost_per_apple": {"name": "cost_per_apple", "group": "Ungrouped variables", "definition": "1.1", "description": "", "templateType": "anything"}, "total_cost": {"name": "total_cost", "group": "Ungrouped variables", "definition": "cost_per_apple * apples_to_buy", "description": "", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["a_apples", "b_apples", "apples_to_buy", "cost_per_apple", "total_cost"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "numberentry", "useCustomName": true, "customName": "How many apples to buy", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "My family wants {a_apples} bags of apples and my friend wants {b_apples} bags of apples. How many bags of apples should I buy?
", "minValue": "apples_to_buy", "maxValue": "apples_to_buy", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "gapfill", "useCustomName": true, "customName": "Total cost", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "One bag of apples costs {currency(cost_per_apple,\"£\",\"p\")}. How much will I spend?
\n£ [[0]]
", "gaps": [{"type": "numberentry", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [{"variable": "apples_to_buy", "part": "p0", "must_go_first": false}], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "minValue": "total_cost", "maxValue": "total_cost", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "Adaptive marking: use data provided by the student in later parts", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}], "tags": [], "metadata": {"description": "This question models an experiment: the student must collect some data and enter it at the start of the question, and the expected answers to subsequent parts are marked based on that data.
\nA downside of working this way is that you have to set up the variable replacements on each part of the question. You could avoid this by using explore mode.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "This question demonstrates how to use adaptive marking to take data from the student and use it when marking later parts.
\nView this question in the Numbas editor.
", "advice": "To calculate the volume of your box, multiply its width, depth and height together.
", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"width": {"name": "width", "group": "Ungrouped variables", "definition": "1", "description": "", "templateType": "anything", "can_override": false}, "height": {"name": "height", "group": "Ungrouped variables", "definition": "2", "description": "", "templateType": "anything", "can_override": false}, "depth": {"name": "depth", "group": "Ungrouped variables", "definition": "3", "description": "", "templateType": "anything", "can_override": false}, "volume": {"name": "volume", "group": "Ungrouped variables", "definition": "width * height * depth", "description": "The volume of the box.
", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["width", "height", "depth", "volume"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "gapfill", "useCustomName": true, "customName": "Longest side", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": false, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Measure a cuboid box. Enter its dimension, in centimetres, below.
\n| Width | \n[[0]] | \n
| Height | \n[[1]] | \n
| Depth | \n[[2]] | \n
What is the volume of your box, in cm³?
", "minValue": "volume", "maxValue": "volume", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}, {"type": "numberentry", "useCustomName": true, "customName": "Longest side", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [{"variable": "width", "part": "p0g0", "must_go_first": true}, {"variable": "height", "part": "p0g1", "must_go_first": true}, {"variable": "depth", "part": "p0g2", "must_go_first": true}], "variableReplacementStrategy": "alwaysreplace", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "What is the longest dimension of the box, in cm?
", "minValue": "max([width,depth,height])", "maxValue": "max([width,depth,height])", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}]}, {"name": "Extensions", "pickingStrategy": "all-ordered", "pickQuestions": "1", "questionNames": ["Random people", "Quantities with units", "Spreadsheets"], "variable_overrides": [[], [], []], "questions": [{"name": "Numbas demo: random person extension", "extensions": ["random_person"], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Elliott Fletcher", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1591/"}], "tags": [], "metadata": {"description": "A demonstration of the random person extension, which picks representative names of people.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "When writing word problems, it's good to ensure a fair balance of gender and other characteristics in named characters. The 'random person' extension makes this easy.
\nSee this question in the public editor.
", "advice": "We are told that {pname} gets paid a total of $£\\var{payment}$ at the end of {their} summer job and that {they} work{s} at {their} job for $\\var{weeks}$ weeks.
\nTo calculate the amount of money {pname} gets paid per week, we divide the total amount of money that {they} earn{s} at the end of {their} job by how many weeks that {they} work{s} for.
\n\\[£\\displaystyle\\frac{\\var{payment}}{\\var{weeks}} = £\\var{{payment/weeks}}.\\]
\nTherefore {pname} gets paid $£\\var{{payment/weeks}}$/week.
\nNote that in compound measures, a forward slash symbol / is often used instead of the word 'per'. So $£\\var{{payment/weeks}}$/week means the same as $£\\var{{payment/weeks}}$ per week.
", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"person": {"name": "person", "group": "A person", "definition": "random_person()", "description": "A random person
", "templateType": "anything", "can_override": false}, "weeks": {"name": "weeks", "group": "Ungrouped variables", "definition": "random(5,8)", "description": "Number of weeks person works for
", "templateType": "anything", "can_override": false}, "payment": {"name": "payment", "group": "Ungrouped variables", "definition": "random(1400,1600,1800)", "description": "amount person gets paid
", "templateType": "anything", "can_override": false}, "pname": {"name": "pname", "group": "A person", "definition": "person[\"name\"]", "description": "", "templateType": "anything", "can_override": false}, "they": {"name": "they", "group": "A person", "definition": "person[\"pronouns\"][\"they\"]", "description": "", "templateType": "anything", "can_override": false}, "their": {"name": "their", "group": "A person", "definition": "person[\"pronouns\"][\"their\"]", "description": "", "templateType": "anything", "can_override": false}, "theirs": {"name": "theirs", "group": "A person", "definition": "person[\"pronouns\"][\"theirs\"]", "description": "", "templateType": "anything", "can_override": false}, "s": {"name": "s", "group": "A person", "definition": "if(person[\"gender\"]=\"neutral\",\"\",\"s\")", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["payment", "weeks"], "variable_groups": [{"name": "A person", "variables": ["person", "pname", "they", "their", "theirs", "s"]}], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "{pname} gets paid a total of $£\\var{payment}$ at the end of {their} summer job; {they} work{s} for $\\var{weeks}$ weeks.
\nHow much does {pname} get paid per week?
\n£[[0]]/week
", "gaps": [{"type": "numberentry", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "minValue": "{payment}/{weeks}", "maxValue": "{payment}/{weeks}", "correctAnswerFraction": false, "allowFractions": false, "mustBeReduced": false, "mustBeReducedPC": 0, "displayAnswer": "", "showFractionHint": true, "notationStyles": ["plain", "en", "si-en"], "correctAnswerStyle": "plain"}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "Numbas demo: quantities with units", "extensions": ["quantities"], "custom_part_types": [{"source": {"pk": 7, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/7/edit"}, "name": "Quantity with units", "short_name": "quantity", "description": "The student enters a quantity with units.
", "help_url": "https://github.com/numbas/numbas-extension-quantities", "input_widget": "string", "input_options": {"correctAnswer": "plain_string(settings[\"correctAnswer\"])", "hint": {"static": false, "value": "switch(\n settings[\"hint\"]=\"remind units\",\n \"Include units in your answer.\",\n settings[\"hint\"]=\"show units\",\n \"Give your answer in \"+units_string(settings[\"correctAnswer\"])\n ,\n \"\"\n)"}, "allowEmpty": {"static": true, "value": false}}, "can_be_gap": true, "can_be_step": true, "marking_script": "mark:\napply(valid_number);\napply(student_quantity);\napply(has_units);\napply(compatible);\ntry(\n correctif(close_enough),\n x,\n apply(student_quantity)\n);\napply(same_units)\n\ninterpreted_answer:\nstudent_quantity\n\nallowed_notation_styles:\n[\"plain\",\"en\"]\n\nmatch_student_number:\nmatchnumber(studentAnswer,allowed_notation_styles)\n\nstudent_number:\nmatch_student_number[1]\n\nraw_student_units:\ntry(\n quantity(studentAnswer[len(match_student_number[0])..len(studentAnswer)]),\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)\n\nstudent_units:\nif(compatible(raw_student_units,correct_units) or settings[\"incompatible_units_action\"]<>\"convert\",\n raw_student_units,\n correct_units\n)\n\nstudent_quantity:\napply(student_units);\ntry(\n student_number * student_units,\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)\n\ncorrect_quantity:\nsettings[\"correctAnswer\"]\n\ncompatible:\nif(compatible(raw_student_units,correct_quantity),\n true\n,\n let(message,\"Your answer does not have the correct dimensions.\",\n if(settings[\"incompatible_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n if(settings[\"incompatible_units_action\"]=\"convert\",\n incorrect(\"Your answer does not have the correct dimensions. It will be marked as if the correct dimensions were used, and then a penalty will be applied.\")\n ,\n incorrect(\"Your answer does not have the correct dimensions.\");\n end()\n )\n );\n false\n )\n)\n\ncorrect_units:\nunits(correct_quantity)\n\nsame_units:\nassert(raw_student_units=correct_units,\n let(\n message,if(settings[\"hint\"]=\"show units\",\"You did not give your answer in \"+units_string(correct_units)+\".\", \"Your answer is not in the expected units.\"),\n switch(\n settings[\"different_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n settings[\"different_units_action\"]=\"incorrect\",\n incorrect(message); \n warn(message);\n end()\n ,\n settings[\"different_units_action\"]=\"warn\",\n warn(message);\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n settings[\"different_units_penalty\"]<1,\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n false\n )\n );\n false\n)\n\nhas_units:\nassert(not unitless(student_quantity),\n assert(settings[\"allow_unitless\"],\n warn(\"You must include the units in your answer.\");\n fail(\"You did not include units in your answer.\")\n )\n)\n\ncan_compare:\ncompatible or settings[\"incompatible_units_action\"]=\"convert\"\n\nclose_enough:\nif(can_compare,\n student_quantity>=correct_quantity - wiggle \n and \n student_quantity<=correct_quantity + wiggle \n,\n false\n)\n\nwiggle:\nunits(correct_quantity)*abs(eval(settings[\"wiggle\"]))\n\nvalid_number:\nif(isNaN(student_number),\n warn(translate(\"part.numberentry.answer invalid\"));\n fail(translate(\"part.numberentry.answer invalid\"))\n,\n true\n )", "marking_notes": [{"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "apply(valid_number);\napply(student_quantity);\napply(has_units);\napply(compatible);\ntry(\n correctif(close_enough),\n x,\n apply(student_quantity)\n);\napply(same_units)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "student_quantity"}, {"name": "allowed_notation_styles", "description": "", "definition": "[\"plain\",\"en\"]"}, {"name": "match_student_number", "description": "", "definition": "matchnumber(studentAnswer,allowed_notation_styles)"}, {"name": "student_number", "description": "The scalar part of the student's quantity
", "definition": "match_student_number[1]"}, {"name": "raw_student_units", "description": "The units of the student's quantity, before converting.
", "definition": "try(\n quantity(studentAnswer[len(match_student_number[0])..len(studentAnswer)]),\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)"}, {"name": "student_units", "description": "The units of the student's quantity.
\nIf the student used units incompatible with the units in the expected answer, and the \"what to do if incompatible units used\" option is set to \"mark as if correct units used\", the student's units are ignored and the expected units are used instead.
", "definition": "if(compatible(raw_student_units,correct_units) or settings[\"incompatible_units_action\"]<>\"convert\",\n raw_student_units,\n correct_units\n)"}, {"name": "student_quantity", "description": "The student's answer, interpreted as a quantity.
\nMarking fails if the student does not enter a valid quantity.
", "definition": "apply(student_units);\ntry(\n student_number * student_units,\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)"}, {"name": "correct_quantity", "description": "", "definition": "settings[\"correctAnswer\"]"}, {"name": "compatible", "description": "Are the units of the student's quantity compatible with the units of the expected quantity?
", "definition": "if(compatible(raw_student_units,correct_quantity),\n true\n,\n let(message,\"Your answer does not have the correct dimensions.\",\n if(settings[\"incompatible_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n if(settings[\"incompatible_units_action\"]=\"convert\",\n incorrect(\"Your answer does not have the correct dimensions. It will be marked as if the correct dimensions were used, and then a penalty will be applied.\")\n ,\n incorrect(\"Your answer does not have the correct dimensions.\");\n end()\n )\n );\n false\n )\n)"}, {"name": "correct_units", "description": "", "definition": "units(correct_quantity)"}, {"name": "same_units", "description": "/Are the student's quantity and the expected quantity in exactly the same units?
", "definition": "assert(raw_student_units=correct_units,\n let(\n message,if(settings[\"hint\"]=\"show units\",\"You did not give your answer in \"+units_string(correct_units)+\".\", \"Your answer is not in the expected units.\"),\n switch(\n settings[\"different_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n settings[\"different_units_action\"]=\"incorrect\",\n incorrect(message); \n warn(message);\n end()\n ,\n settings[\"different_units_action\"]=\"warn\",\n warn(message);\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n settings[\"different_units_penalty\"]<1,\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n false\n )\n );\n false\n)"}, {"name": "has_units", "description": "", "definition": "assert(not unitless(student_quantity),\n assert(settings[\"allow_unitless\"],\n warn(\"You must include the units in your answer.\");\n fail(\"You did not include units in your answer.\")\n )\n)"}, {"name": "can_compare", "description": "Can the student's answer be compared with the correct answer? True if compatible units used, or \"mark as if correct units used\" selected.
", "definition": "compatible or settings[\"incompatible_units_action\"]=\"convert\""}, {"name": "close_enough", "description": "Is the student's quantity within the allowed tolerance of the expected answer?
", "definition": "if(can_compare,\n student_quantity>=correct_quantity - wiggle \n and \n student_quantity<=correct_quantity + wiggle \n,\n false\n)"}, {"name": "wiggle", "description": "", "definition": "units(correct_quantity)*abs(eval(settings[\"wiggle\"]))"}, {"name": "valid_number", "description": "Is the scalar part of the student's answer a valid number?
", "definition": "if(isNaN(student_number),\n warn(translate(\"part.numberentry.answer invalid\"));\n fail(translate(\"part.numberentry.answer invalid\"))\n,\n true\n )\n"}], "settings": [{"name": "correctAnswer", "label": "Correct answer", "help_url": "", "hint": "The expected quantity.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "hint", "label": "Input hint", "help_url": "", "hint": "", "input_type": "dropdown", "default_value": "remind units", "choices": [{"value": "none", "label": "None"}, {"value": "remind units", "label": "Remind to include units"}, {"value": "show units", "label": "Show required units"}]}, {"name": "allow_unitless", "label": "Allow unitless answer?", "help_url": "", "hint": "If not ticked, the student is prevented from submitting an answer without specifying units.", "input_type": "checkbox", "default_value": true}, {"name": "incompatible_units_action", "label": "What to do if incompatible units used", "help_url": "", "hint": "If the student's answer is given in units incompatible with the correct answer's units:\n
- \n
- \"Prevent submission\": Prevent the student from submitting until they use compatible units \n
- \"Mark as incorrect\": Mark the student's answer as incorrect. \n
- \"Mark as if correct units used\": Mark the student's answer as if they used the correct units, and apply the \"different units used\" penalty. \n
\n
- \n
- \"Convert\" - silently convert the student's answer to the units used in the correct answer. \n
- \"Warn and convert\" - show a warning to the student, but convert. \n
- \"Prevent submission\" - don't allow the student to submit, and show a warning that they must use the same units. \n
- \"Mark incorrect\" - the student's answer is marked as incorrect. \n
A demo of the \"quantities with units\" extension and custom part type.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "The 'quantities with units' extension adds tools to work with measurements. You can do arithmetic on quantities with associated units, and there's a custom part type which asks the student to enter a quantity along with its units.
\nSee this question on the public editor.
", "advice": "", "rulesets": {}, "variables": {"width": {"name": "width", "group": "Ungrouped variables", "definition": "qty(random(30..80#10),\"cm\")", "description": "", "templateType": "anything"}, "height": {"name": "height", "group": "Ungrouped variables", "definition": "qty(random(20..50#10),\"cm\")", "description": "", "templateType": "anything"}, "length": {"name": "length", "group": "Ungrouped variables", "definition": "qty(random(10..40#10),\"cm\")", "description": "", "templateType": "anything"}, "weight": {"name": "weight", "group": "Ungrouped variables", "definition": "density*length*width*height", "description": "", "templateType": "anything"}, "density": {"name": "density", "group": "Ungrouped variables", "definition": "qty(random(100..200#1),\"kg/m^3\")", "description": "", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["width", "height", "length", "weight", "density"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "quantity", "useCustomName": true, "customName": "A quantity with associated units", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Write 1kg. Any compatible unit is also acceptable.
\nTry 1kg, 1000g.
You can require that the student uses exactly the same units as the expected answer, rather than converting between compatible units.
\nConvert 240cm to metres.
\nTry 2.4m and 240cm.
You can prevent the student from submitting an answer without units.
\nWrite 15cm.
", "settings": {"correctAnswer": "qty(15,\"cm\")", "hint": "remind units", "allow_unitless": false, "incompatible_units_action": "incorrect", "different_units_action": "convert", "different_units_penalty": "100", "wiggle": "10^-12"}}, {"type": "quantity", "useCustomName": true, "customName": "Randomised answers", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "You can do arithmetic with quantities. In this part, the dimensions of the box and its density are randomised, and the weight is calculated from that.
\nA box measures {width} by {height} by {length}, and weights {weight}.
\nWhat is the box's density?
\nTry {plain_string(density)} and{plain_string(density in \"g/cm^3\")}.
An editable spreadsheet. Ranges of cells can be disabled, and you can specify ranges of cells to be marked. A cell is marked correct if its value is equal to the value in the expected answer spreadsheet.
", "help_url": "", "input_widget": "spread-sheet", "input_options": {"correctAnswer": "settings[\"correct_answer\"]", "hint": {"static": true, "value": ""}, "initial_sheet": {"static": false, "value": "disable_cells(settings[\"initial_sheet\"], settings[\"disable_ranges\"])"}}, "can_be_gap": true, "can_be_step": true, "marking_script": "correctAnswer:\nsettings[\"correct_answer\"]\n\nmark:\nif(sum(mark_ranges)=0,\n incorrect(),\n apply(mark_ranges)\n)\n\ninterpreted_answer:\nstudentAnswer\n\nrange_cells:\nmap(parse_range(ref),ref,values(settings[\"mark_ranges\"]))\n\ntotal_cells:\nlen(flatten(range_cells))\n\nrange_weights:\nswitch(\n settings[\"marking_method\"]=\"per_cell\",\n map(len(r)/total_cells, r, range_cells),\n // otherwise, mark per range\n repeat(1/len(range_cells), len(range_cells))\n)\n\nmark_ranges:\nmap(\n let(\n range_credit,\n sum(map(\n let(\n correctCellString, correctAnswer[c],\n correctCellNumber, parsenumber(correctCellString, notation_styles),\n studentCellString, studentAnswer[c],\n studentCellNumber, parsenumber(studentCellString, notation_styles),\n award(\n 1/len(cells), \n if(isnan(correctCellNumber) and correctCellString<>\"\",\n lower(correctCellString) = lower(studentCellString),\n abs(studentCellNumber - if(isnan(correctCellNumber),0,correctCellNumber)) <= settings[\"tolerance\"]\n )\n )\n ),\n c,\n cells\n )),\n message,\n switch(\n range_credit=0,\n if(len(cells)=1, \"This entry is incorrect.\", \"All entries in this range are incorrect.\"),\n range_credit=1,\n if(len(cells)=1, \"This entry is correct.\", \"All entries in this range are correct.\"),\n //otherwise\n \"Some entries in this range are correct.\"\n ),\n assert(len(cells)=0, add_credit(range_credit*w, \"{name}: \"+message)); \n range_credit\n ),\n [cells,w,name],\n zip(range_cells, range_weights, keys(settings[\"mark_ranges\"]))\n)\n\nnotation_styles:\n[\"plain\",\"si-en\"]", "marking_notes": [{"name": "correctAnswer", "description": "A spreadsheet representing the expected answer.
", "definition": "settings[\"correct_answer\"]"}, {"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(sum(mark_ranges)=0,\n incorrect(),\n apply(mark_ranges)\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer"}, {"name": "range_cells", "description": "For each range to be marked, the addresses of the cells in that range.
", "definition": "map(parse_range(ref),ref,values(settings[\"mark_ranges\"]))"}, {"name": "total_cells", "description": "The total number of cells to be marked. Cells in overlapping ranges will be counted once for each range they're in.
", "definition": "len(flatten(range_cells))"}, {"name": "range_weights", "description": "The weight of each range, as a proportion of the available credit.
", "definition": "switch(\n settings[\"marking_method\"]=\"per_cell\",\n map(len(r)/total_cells, r, range_cells),\n // otherwise, mark per range\n repeat(1/len(range_cells), len(range_cells))\n)"}, {"name": "mark_ranges", "description": "Mark each of the ranges specified by the question author.
", "definition": "map(\n let(\n range_credit,\n sum(map(\n let(\n correctCellString, correctAnswer[c],\n correctCellNumber, parsenumber(correctCellString, notation_styles),\n studentCellString, studentAnswer[c],\n studentCellNumber, parsenumber(studentCellString, notation_styles),\n award(\n 1/len(cells), \n if(isnan(correctCellNumber) and correctCellString<>\"\",\n lower(correctCellString) = lower(studentCellString),\n abs(studentCellNumber - if(isnan(correctCellNumber),0,correctCellNumber)) <= settings[\"tolerance\"]\n )\n )\n ),\n c,\n cells\n )),\n message,\n switch(\n range_credit=0,\n if(len(cells)=1, \"This entry is incorrect.\", \"All entries in this range are incorrect.\"),\n range_credit=1,\n if(len(cells)=1, \"This entry is correct.\", \"All entries in this range are correct.\"),\n //otherwise\n \"Some entries in this range are correct.\"\n ),\n assert(len(cells)=0, add_credit(range_credit*w, \"{name}: \"+message)); \n range_credit\n ),\n [cells,w,name],\n zip(range_cells, range_weights, keys(settings[\"mark_ranges\"]))\n)"}, {"name": "notation_styles", "description": "Accepted number notation styles for a value in an individual cell.
", "definition": "[\"plain\",\"si-en\"]"}], "settings": [{"name": "initial_sheet", "label": "Initial sheet", "help_url": "", "hint": "Aspreadsheet object giving the initial state of the sheet that the student should fill in.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "correct_answer", "label": "Correct answer", "help_url": "", "hint": "A spreadsheet object representing a correct answer to the part.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "disable_ranges", "label": "Ranges to disable", "help_url": "", "hint": "A list of cell or range references, denoting the cells that should not be editable.", "input_type": "code", "default_value": "[]", "evaluate": true}, {"name": "mark_ranges", "label": "Ranges to mark", "help_url": "", "hint": "A dictionary of cell or range references, mapping names to ranges of cells, denoting the cells that should be compared for equality with the expected answer.", "input_type": "code", "default_value": "dict()", "evaluate": true}, {"name": "marking_method", "label": "Marking method", "help_url": "", "hint": "", "input_type": "dropdown", "default_value": "per_cell", "choices": [{"value": "per_cell", "label": "Each cell has the same weight"}, {"value": "per_range", "label": "Each range has the same weight"}]}, {"name": "tolerance", "label": "Allowed margin of error", "help_url": "", "hint": "", "input_type": "code", "default_value": "0", "evaluate": true}], "public_availability": "always", "published": true, "extensions": ["sheets"]}], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "http://clppc:8000/accounts/profile/1/"}, {"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}], "tags": [], "metadata": {"description": "Using some passages of text, fill in a product fact sheet.
\nA simple example showing how to mark entries in a spreadsheet.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "You're considering buying a new {product_name}. The manufacturer's website contains the following information:
\n\n\nThe new {product_name} does everything you need it do. Drawing only {electricity_use}W, it uses much less electricity than most towns. And invention fluid use is lower than ever, at a mere {fluid_use}ml per hour.
\nMeasuring {dimensions[0]}×{dimensions[1]}×{dimensions[2]}cm, where can't you put it?
\nPriced affordably at {currency(price,\"£\",\"p\")}, get one today!
\n
You also found some reviews online:
\n{reviews_table}
\nOne review noted that each {product_name} incurs {currency(externalised_costs,\"£\",\"p\")} in externalised costs.
", "advice": "", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"raw_spreadsheet": {"name": "raw_spreadsheet", "group": "Spreadsheet", "definition": "spreadsheet_from_base64_file(safe(\"product-fact-sheet.xlsx\"), safe(\"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\"))", "description": "", "templateType": "spreadsheet", "can_override": false}, "filled_spreadsheet": {"name": "filled_spreadsheet", "group": "Completed spreadsheet", "definition": "raw_spreadsheet\n|> fill_range(\"B2\",[[product_name]])\n|> fill_range(\"D2\", [[price]])\n|> fill_range(\"F3:F6\", [[electricity_use],[fluid_use],[externalised_costs]])\n|> fill_range(\"A5:C5\", [dimensions])\n|> fill_range(\"B9:D9\", [review_counts])", "description": "", "templateType": "anything", "can_override": false}, "product_names": {"name": "product_names", "group": "Data", "definition": "[ \"Whizzo 3\", \"The New Gloop\", \"Vwlr\", \"Crumpetron\", \"Autocomb Pro\" ]", "description": "", "templateType": "list of strings", "can_override": false}, "product_name": {"name": "product_name", "group": "Data", "definition": "random(product_names)", "description": "", "templateType": "anything", "can_override": false}, "dimensions": {"name": "dimensions", "group": "Data", "definition": "repeat(random(10..100#5),3)", "description": "", "templateType": "anything", "can_override": false}, "electricity_use": {"name": "electricity_use", "group": "Data", "definition": "random(10..200#5)", "description": "", "templateType": "anything", "can_override": false}, "fluid_use": {"name": "fluid_use", "group": "Data", "definition": "random(300..900#10)", "description": "", "templateType": "anything", "can_override": false}, "externalised_costs": {"name": "externalised_costs", "group": "Data", "definition": "random(1000..9000#100)", "description": "", "templateType": "anything", "can_override": false}, "price": {"name": "price", "group": "Data", "definition": "random(59..409#10)", "description": "", "templateType": "anything", "can_override": false}, "individual_reviews": {"name": "individual_reviews", "group": "Data", "definition": "repeat(random(scores),5)", "description": "", "templateType": "anything", "can_override": false}, "all_reviewers": {"name": "all_reviewers", "group": "Data", "definition": "[ \"Invention Review\", \"Product Quarterly\", \"Whence Gizmos\", \"Doodads Today\", \"That Thingamajig\", \"Contraption Action\" ]", "description": "", "templateType": "list of strings", "can_override": false}, "reviewers": {"name": "reviewers", "group": "Data", "definition": "shuffle(all_reviewers)", "description": "", "templateType": "anything", "can_override": false}, "reviews_table": {"name": "reviews_table", "group": "Data", "definition": "table(zip(reviewers,individual_reviews),[\"Reviewer\",\"Score\"])", "description": "", "templateType": "anything", "can_override": false}, "review_counts": {"name": "review_counts", "group": "Data", "definition": "map(len(filter(x=score,x,individual_reviews)),score,scores)", "description": "", "templateType": "anything", "can_override": false}, "scores": {"name": "scores", "group": "Data", "definition": "[ \"Bad\", \"Neutral\", \"Good\" ]", "description": "", "templateType": "list of strings", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": [], "variable_groups": [{"name": "Spreadsheet", "variables": ["raw_spreadsheet"]}, {"name": "Data", "variables": ["product_names", "product_name", "dimensions", "electricity_use", "fluid_use", "externalised_costs", "price", "scores", "individual_reviews", "all_reviewers", "reviewers", "reviews_table", "review_counts"]}, {"name": "Completed spreadsheet", "variables": ["filled_spreadsheet"]}], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "spreadsheet", "useCustomName": false, "customName": "", "marks": "11", "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Before making a purchase, you always fill in a product fact sheet. Fill in the product fact sheet for the {product_name}, using the information above.
", "settings": {"initial_sheet": "raw_spreadsheet", "correct_answer": "filled_spreadsheet", "disable_ranges": "[\"A1:F1\", \"A2\",\"C2\",\"E2:F2\",\"A3:C3\",\"A4:C4\",\"E3:E5\",\"A7:D8\",\"A8:A9\"]", "mark_ranges": "[\n \"Product name\": \"B2\",\n \"Price\": \"D2\",\n \"Running costs\": \"F3:F5\",\n \"Dimensions\": \"A5:C5\",\n \"Reviews\": \"B9:D9\"\n]", "marking_method": "per_cell", "tolerance": "0"}}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}]}], "allowPrinting": true, "navigation": {"allowregen": true, "reverse": true, "browse": true, "allowsteps": true, "showfrontpage": false, "showresultspage": "oncompletion", "navigatemode": "menu", "onleave": {"action": "none", "message": ""}, "preventleave": false, "typeendtoleave": false, "startpassword": "", "allowAttemptDownload": false, "downloadEncryptionKey": ""}, "timing": {"allowPause": true, "timeout": {"action": "none", "message": ""}, "timedwarning": {"action": "none", "message": ""}}, "feedback": {"showactualmark": true, "showtotalmark": true, "showanswerstate": true, "allowrevealanswer": true, "advicethreshold": 0, "intro": "This is Numbas.
\nA Numbas test consists of one or more questions, each of which is split up into one or more parts.
\nTry the questions in this demo exam to see Numbas' advanced features for yourself.
\nUse the Try another question like this one button to re-randomise a question, and the Reveal answers button to see a worked solution along with model answers.
\nSee this exam in the public editor.
", "end_message": "", "reviewshowscore": true, "reviewshowfeedback": true, "reviewshowexpectedanswer": true, "reviewshowadvice": true, "results_options": {"printquestions": true, "printadvice": true}, "feedbackmessages": []}, "diagnostic": {"knowledge_graph": {"topics": [], "learning_objectives": []}, "script": "diagnosys", "customScript": ""}, "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Chris Graham", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/369/"}, {"name": "Aamir Khan", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/4537/"}, {"name": "Laura Midgley", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/18287/"}], "extensions": ["eukleides", "geogebra", "jsxgraph", "quantities", "random_person", "sheets", "stats"], "custom_part_types": [{"source": {"pk": 3, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/3/edit"}, "name": "Give a numerical input for an expression", "short_name": "give-a-numerical-input-for-an-expression", "description": "The student gives a point $x$ at which to evaluate a given function $f$. The answer is correct if $f(x)$ is the expected value.
", "help_url": "", "input_widget": "number", "input_options": {"correctAnswer": "settings[\"correctAnswer\"]", "hint": {"static": true, "value": ""}, "allowedNotationStyles": {"static": true, "value": ["plain", "en", "si-en"]}, "allowFractions": {"static": true, "value": true}}, "can_be_gap": true, "can_be_step": true, "marking_script": "mark:\nif(equal,\n correct()\n,\n incorrect(settings[\"student_value_description\"]+\" $\"+student_value+\"$.\")\n)\n\ninterpreted_answer:\nstudentAnswer\n\nstudent_value:\neval(settings[\"expression\"],[\"x\":studentAnswer])\n\nequal:\nwithintolerance(student_value,settings[\"expected_value\"],0.00001)", "marking_notes": [{"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(equal,\n correct()\n,\n incorrect(settings[\"student_value_description\"]+\" $\"+student_value+\"$.\")\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer"}, {"name": "student_value", "description": "", "definition": "eval(settings[\"expression\"],[\"x\":studentAnswer])"}, {"name": "equal", "description": "", "definition": "withintolerance(student_value,settings[\"expected_value\"],0.00001)"}], "settings": [{"name": "expected_value", "label": "Expected value", "help_url": "", "hint": "The value that the function should take at the given point.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "correctAnswer", "label": "Correct answer", "help_url": "", "hint": "The value that the student should write.", "input_type": "string", "default_value": "", "subvars": true}, {"name": "student_value_description", "label": "Description of the student's value", "help_url": "", "hint": "", "input_type": "string", "default_value": "The value at your point is", "subvars": true}, {"name": "expression", "label": "Function to evaluate", "help_url": "", "hint": "The function that will be applied to the student's number.The student's number will be substituted for $x$ in this expression.", "input_type": "mathematical_expression", "default_value": "", "subvars": true}], "public_availability": "always", "published": true, "extensions": []}, {"source": {"pk": 2, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/2/edit"}, "name": "List of numbers", "short_name": "list-of-numbers", "description": "
The answer is a comma-separated list of numbers.
\nThe list is marked correct if each number occurs the same number of times as in the expected answer, and no extra numbers are present.
\nYou can optionally treat the answer as a set, so the number of occurrences doesn't matter, only whether each number is included or not.
", "help_url": "", "input_widget": "string", "input_options": {"correctAnswer": "join(\n if(settings[\"correctAnswerFractions\"],\n map(let([a,b],rational_approximation(x), string(a/b)),x,settings[\"correctAnswer\"])\n ,\n settings[\"correctAnswer\"]\n ),\n settings[\"separator\"] + \" \"\n)", "hint": {"static": false, "value": "if(settings[\"show_input_hint\"],\n \"Enter a list of numbers separated by{settings['separator']}.\",\n \"\"\n)"}, "allowEmpty": {"static": true, "value": true}}, "can_be_gap": true, "can_be_step": true, "marking_script": "bits:\nlet(b,filter(x<>\"\",x,split(studentAnswer,settings[\"separator\"])),\n if(isSet,list(set(b)),b)\n)\n\nexpected_numbers:\nlet(l,settings[\"correctAnswer\"] as \"list\",\n if(isSet,list(set(l)),l)\n)\n\nvalid_numbers:\nif(all(map(not isnan(x),x,interpreted_answer)),\n true,\n let(index,filter(isnan(interpreted_answer[x]),x,0..len(interpreted_answer)-1)[0], wrong, bits[index],\n warn(wrong+\" is not a valid number\");\n fail(wrong+\" is not a valid number.\")\n )\n )\n\nis_sorted:\nassert(sort(interpreted_answer)=interpreted_answer,\n multiply_credit(0.5,\"Not in order\")\n )\n\nincluded:\nmap(\n let(\n num_student,len(filter(x=y,y,interpreted_answer)),\n num_expected,len(filter(x=y,y,expected_numbers)),\n switch(\n num_student=num_expected,\n true,\n num_studentIs every number in the student's list valid?
", "definition": "if(all(map(not isnan(x),x,interpreted_answer)),\n true,\n let(index,filter(isnan(interpreted_answer[x]),x,0..len(interpreted_answer)-1)[0], wrong, bits[index],\n warn(wrong+\" is not a valid number\");\n fail(wrong+\" is not a valid number.\")\n )\n )"}, {"name": "is_sorted", "description": "Are the student's answers in ascending order?
", "definition": "assert(sort(interpreted_answer)=interpreted_answer,\n multiply_credit(0.5,\"Not in order\")\n )"}, {"name": "included", "description": "Is each number in the expected answer present in the student's list the correct number of times?
", "definition": "map(\n let(\n num_student,len(filter(x=y,y,interpreted_answer)),\n num_expected,len(filter(x=y,y,expected_numbers)),\n switch(\n num_student=num_expected,\n true,\n num_studentTrue if the student's list doesn't contain any numbers that aren't in the expected answer.
", "definition": "if(all(map(x in expected_numbers, x, interpreted_answer)),\n true\n ,\n incorrect(\"Your answer contains \"+extra_numbers[0]+\" but should not.\");\n false\n )"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "if(lower(studentAnswer) in [\"empty\",\"\u2205\"],[],\n map(\n if(settings[\"allowFractions\"],parsenumber_or_fraction(x,notationStyles), parsenumber(x,notationStyles))\n ,x\n ,bits\n )\n)"}, {"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(studentanswer=\"\",fail(\"You have not entered an answer\"),false);\napply(valid_numbers);\napply(included);\napply(no_extras);\ncorrectif(all_included and no_extras)"}, {"name": "notationStyles", "description": "", "definition": "[\"en\"]"}, {"name": "isSet", "description": "Should the answer be considered as a set, so the number of times an element occurs doesn't matter?
", "definition": "settings[\"isSet\"]"}, {"name": "extra_numbers", "description": "Numbers included in the student's answer that are not in the expected list.
", "definition": "filter(not (x in expected_numbers),x,interpreted_answer)"}], "settings": [{"name": "correctAnswer", "label": "Correct answer", "help_url": "", "hint": "The list of numbers that the student should enter. The order does not matter.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "allowFractions", "label": "Allow the student to enter fractions?", "help_url": "", "hint": "", "input_type": "checkbox", "default_value": false}, {"name": "correctAnswerFractions", "label": "Display the correct answers as fractions?", "help_url": "", "hint": "", "input_type": "checkbox", "default_value": false}, {"name": "isSet", "label": "Is the answer a set?", "help_url": "", "hint": "If ticked, the number of times an element occurs doesn't matter, only whether it's included at all.", "input_type": "checkbox", "default_value": false}, {"name": "show_input_hint", "label": "Show the input hint?", "help_url": "", "hint": "", "input_type": "checkbox", "default_value": true}, {"name": "separator", "label": "Separator", "help_url": "", "hint": "The substring that should separate items in the student's list", "input_type": "string", "default_value": ",", "subvars": false}], "public_availability": "always", "published": true, "extensions": []}, {"source": {"pk": 7, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/7/edit"}, "name": "Quantity with units", "short_name": "quantity", "description": "The student enters a quantity with units.
", "help_url": "https://github.com/numbas/numbas-extension-quantities", "input_widget": "string", "input_options": {"correctAnswer": "plain_string(settings[\"correctAnswer\"])", "hint": {"static": false, "value": "switch(\n settings[\"hint\"]=\"remind units\",\n \"Include units in your answer.\",\n settings[\"hint\"]=\"show units\",\n \"Give your answer in \"+units_string(settings[\"correctAnswer\"])\n ,\n \"\"\n)"}, "allowEmpty": {"static": true, "value": false}}, "can_be_gap": true, "can_be_step": true, "marking_script": "mark:\napply(valid_number);\napply(student_quantity);\napply(has_units);\napply(compatible);\ntry(\n correctif(close_enough),\n x,\n apply(student_quantity)\n);\napply(same_units)\n\ninterpreted_answer:\nstudent_quantity\n\nallowed_notation_styles:\n[\"plain\",\"en\"]\n\nmatch_student_number:\nmatchnumber(studentAnswer,allowed_notation_styles)\n\nstudent_number:\nmatch_student_number[1]\n\nraw_student_units:\ntry(\n quantity(studentAnswer[len(match_student_number[0])..len(studentAnswer)]),\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)\n\nstudent_units:\nif(compatible(raw_student_units,correct_units) or settings[\"incompatible_units_action\"]<>\"convert\",\n raw_student_units,\n correct_units\n)\n\nstudent_quantity:\napply(student_units);\ntry(\n student_number * student_units,\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)\n\ncorrect_quantity:\nsettings[\"correctAnswer\"]\n\ncompatible:\nif(compatible(raw_student_units,correct_quantity),\n true\n,\n let(message,\"Your answer does not have the correct dimensions.\",\n if(settings[\"incompatible_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n if(settings[\"incompatible_units_action\"]=\"convert\",\n incorrect(\"Your answer does not have the correct dimensions. It will be marked as if the correct dimensions were used, and then a penalty will be applied.\")\n ,\n incorrect(\"Your answer does not have the correct dimensions.\");\n end()\n )\n );\n false\n )\n)\n\ncorrect_units:\nunits(correct_quantity)\n\nsame_units:\nassert(raw_student_units=correct_units,\n let(\n message,if(settings[\"hint\"]=\"show units\",\"You did not give your answer in \"+units_string(correct_units)+\".\", \"Your answer is not in the expected units.\"),\n switch(\n settings[\"different_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n settings[\"different_units_action\"]=\"incorrect\",\n incorrect(message); \n warn(message);\n end()\n ,\n settings[\"different_units_action\"]=\"warn\",\n warn(message);\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n settings[\"different_units_penalty\"]<1,\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n false\n )\n );\n false\n)\n\nhas_units:\nassert(not unitless(student_quantity),\n assert(settings[\"allow_unitless\"],\n warn(\"You must include the units in your answer.\");\n fail(\"You did not include units in your answer.\")\n )\n)\n\ncan_compare:\ncompatible or settings[\"incompatible_units_action\"]=\"convert\"\n\nclose_enough:\nif(can_compare,\n student_quantity>=correct_quantity - wiggle \n and \n student_quantity<=correct_quantity + wiggle \n,\n false\n)\n\nwiggle:\nunits(correct_quantity)*abs(eval(settings[\"wiggle\"]))\n\nvalid_number:\nif(isNaN(student_number),\n warn(translate(\"part.numberentry.answer invalid\"));\n fail(translate(\"part.numberentry.answer invalid\"))\n,\n true\n )", "marking_notes": [{"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "apply(valid_number);\napply(student_quantity);\napply(has_units);\napply(compatible);\ntry(\n correctif(close_enough),\n x,\n apply(student_quantity)\n);\napply(same_units)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "student_quantity"}, {"name": "allowed_notation_styles", "description": "", "definition": "[\"plain\",\"en\"]"}, {"name": "match_student_number", "description": "", "definition": "matchnumber(studentAnswer,allowed_notation_styles)"}, {"name": "student_number", "description": "The scalar part of the student's quantity
", "definition": "match_student_number[1]"}, {"name": "raw_student_units", "description": "The units of the student's quantity, before converting.
", "definition": "try(\n quantity(studentAnswer[len(match_student_number[0])..len(studentAnswer)]),\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)"}, {"name": "student_units", "description": "The units of the student's quantity.
\nIf the student used units incompatible with the units in the expected answer, and the \"what to do if incompatible units used\" option is set to \"mark as if correct units used\", the student's units are ignored and the expected units are used instead.
", "definition": "if(compatible(raw_student_units,correct_units) or settings[\"incompatible_units_action\"]<>\"convert\",\n raw_student_units,\n correct_units\n)"}, {"name": "student_quantity", "description": "The student's answer, interpreted as a quantity.
\nMarking fails if the student does not enter a valid quantity.
", "definition": "apply(student_units);\ntry(\n student_number * student_units,\n message,\n warn(\"Your answer is not a valid quantity.\");\n fail(\"Your answer is not a valid quantity.\")\n)"}, {"name": "correct_quantity", "description": "", "definition": "settings[\"correctAnswer\"]"}, {"name": "compatible", "description": "Are the units of the student's quantity compatible with the units of the expected quantity?
", "definition": "if(compatible(raw_student_units,correct_quantity),\n true\n,\n let(message,\"Your answer does not have the correct dimensions.\",\n if(settings[\"incompatible_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n if(settings[\"incompatible_units_action\"]=\"convert\",\n incorrect(\"Your answer does not have the correct dimensions. It will be marked as if the correct dimensions were used, and then a penalty will be applied.\")\n ,\n incorrect(\"Your answer does not have the correct dimensions.\");\n end()\n )\n );\n false\n )\n)"}, {"name": "correct_units", "description": "", "definition": "units(correct_quantity)"}, {"name": "same_units", "description": "/Are the student's quantity and the expected quantity in exactly the same units?
", "definition": "assert(raw_student_units=correct_units,\n let(\n message,if(settings[\"hint\"]=\"show units\",\"You did not give your answer in \"+units_string(correct_units)+\".\", \"Your answer is not in the expected units.\"),\n switch(\n settings[\"different_units_action\"]=\"prevent\",\n warn(message);\n fail(message)\n ,\n settings[\"different_units_action\"]=\"incorrect\",\n incorrect(message); \n warn(message);\n end()\n ,\n settings[\"different_units_action\"]=\"warn\",\n warn(message);\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n settings[\"different_units_penalty\"]<1,\n multiply_credit(1-settings[\"different_units_penalty\"],message)\n ,\n false\n )\n );\n false\n)"}, {"name": "has_units", "description": "", "definition": "assert(not unitless(student_quantity),\n assert(settings[\"allow_unitless\"],\n warn(\"You must include the units in your answer.\");\n fail(\"You did not include units in your answer.\")\n )\n)"}, {"name": "can_compare", "description": "Can the student's answer be compared with the correct answer? True if compatible units used, or \"mark as if correct units used\" selected.
", "definition": "compatible or settings[\"incompatible_units_action\"]=\"convert\""}, {"name": "close_enough", "description": "Is the student's quantity within the allowed tolerance of the expected answer?
", "definition": "if(can_compare,\n student_quantity>=correct_quantity - wiggle \n and \n student_quantity<=correct_quantity + wiggle \n,\n false\n)"}, {"name": "wiggle", "description": "", "definition": "units(correct_quantity)*abs(eval(settings[\"wiggle\"]))"}, {"name": "valid_number", "description": "Is the scalar part of the student's answer a valid number?
", "definition": "if(isNaN(student_number),\n warn(translate(\"part.numberentry.answer invalid\"));\n fail(translate(\"part.numberentry.answer invalid\"))\n,\n true\n )\n"}], "settings": [{"name": "correctAnswer", "label": "Correct answer", "help_url": "", "hint": "The expected quantity.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "hint", "label": "Input hint", "help_url": "", "hint": "", "input_type": "dropdown", "default_value": "remind units", "choices": [{"value": "none", "label": "None"}, {"value": "remind units", "label": "Remind to include units"}, {"value": "show units", "label": "Show required units"}]}, {"name": "allow_unitless", "label": "Allow unitless answer?", "help_url": "", "hint": "If not ticked, the student is prevented from submitting an answer without specifying units.", "input_type": "checkbox", "default_value": true}, {"name": "incompatible_units_action", "label": "What to do if incompatible units used", "help_url": "", "hint": "If the student's answer is given in units incompatible with the correct answer's units:\n
- \n
- \"Prevent submission\": Prevent the student from submitting until they use compatible units \n
- \"Mark as incorrect\": Mark the student's answer as incorrect. \n
- \"Mark as if correct units used\": Mark the student's answer as if they used the correct units, and apply the \"different units used\" penalty. \n
\n
- \n
- \"Convert\" - silently convert the student's answer to the units used in the correct answer. \n
- \"Warn and convert\" - show a warning to the student, but convert. \n
- \"Prevent submission\" - don't allow the student to submit, and show a warning that they must use the same units. \n
- \"Mark incorrect\" - the student's answer is marked as incorrect. \n
An editable spreadsheet. Ranges of cells can be disabled, and you can specify ranges of cells to be marked. A cell is marked correct if its value is equal to the value in the expected answer spreadsheet.
", "help_url": "", "input_widget": "spread-sheet", "input_options": {"correctAnswer": "settings[\"correct_answer\"]", "hint": {"static": true, "value": ""}, "initial_sheet": {"static": false, "value": "disable_cells(settings[\"initial_sheet\"], settings[\"disable_ranges\"])"}}, "can_be_gap": true, "can_be_step": true, "marking_script": "correctAnswer:\nsettings[\"correct_answer\"]\n\nmark:\nif(sum(mark_ranges)=0,\n incorrect(),\n apply(mark_ranges)\n)\n\ninterpreted_answer:\nstudentAnswer\n\nrange_cells:\nmap(parse_range(ref),ref,values(settings[\"mark_ranges\"]))\n\ntotal_cells:\nlen(flatten(range_cells))\n\nrange_weights:\nswitch(\n settings[\"marking_method\"]=\"per_cell\",\n map(len(r)/total_cells, r, range_cells),\n // otherwise, mark per range\n repeat(1/len(range_cells), len(range_cells))\n)\n\nmark_ranges:\nmap(\n let(\n range_credit,\n sum(map(\n let(\n correctCellString, correctAnswer[c],\n correctCellNumber, parsenumber(correctCellString, notation_styles),\n studentCellString, studentAnswer[c],\n studentCellNumber, parsenumber(studentCellString, notation_styles),\n award(\n 1/len(cells), \n if(isnan(correctCellNumber) and correctCellString<>\"\",\n lower(correctCellString) = lower(studentCellString),\n abs(studentCellNumber - if(isnan(correctCellNumber),0,correctCellNumber)) <= settings[\"tolerance\"]\n )\n )\n ),\n c,\n cells\n )),\n message,\n switch(\n range_credit=0,\n if(len(cells)=1, \"This entry is incorrect.\", \"All entries in this range are incorrect.\"),\n range_credit=1,\n if(len(cells)=1, \"This entry is correct.\", \"All entries in this range are correct.\"),\n //otherwise\n \"Some entries in this range are correct.\"\n ),\n assert(len(cells)=0, add_credit(range_credit*w, \"{name}: \"+message)); \n range_credit\n ),\n [cells,w,name],\n zip(range_cells, range_weights, keys(settings[\"mark_ranges\"]))\n)\n\nnotation_styles:\n[\"plain\",\"si-en\"]", "marking_notes": [{"name": "correctAnswer", "description": "A spreadsheet representing the expected answer.
", "definition": "settings[\"correct_answer\"]"}, {"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(sum(mark_ranges)=0,\n incorrect(),\n apply(mark_ranges)\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer"}, {"name": "range_cells", "description": "For each range to be marked, the addresses of the cells in that range.
", "definition": "map(parse_range(ref),ref,values(settings[\"mark_ranges\"]))"}, {"name": "total_cells", "description": "The total number of cells to be marked. Cells in overlapping ranges will be counted once for each range they're in.
", "definition": "len(flatten(range_cells))"}, {"name": "range_weights", "description": "The weight of each range, as a proportion of the available credit.
", "definition": "switch(\n settings[\"marking_method\"]=\"per_cell\",\n map(len(r)/total_cells, r, range_cells),\n // otherwise, mark per range\n repeat(1/len(range_cells), len(range_cells))\n)"}, {"name": "mark_ranges", "description": "Mark each of the ranges specified by the question author.
", "definition": "map(\n let(\n range_credit,\n sum(map(\n let(\n correctCellString, correctAnswer[c],\n correctCellNumber, parsenumber(correctCellString, notation_styles),\n studentCellString, studentAnswer[c],\n studentCellNumber, parsenumber(studentCellString, notation_styles),\n award(\n 1/len(cells), \n if(isnan(correctCellNumber) and correctCellString<>\"\",\n lower(correctCellString) = lower(studentCellString),\n abs(studentCellNumber - if(isnan(correctCellNumber),0,correctCellNumber)) <= settings[\"tolerance\"]\n )\n )\n ),\n c,\n cells\n )),\n message,\n switch(\n range_credit=0,\n if(len(cells)=1, \"This entry is incorrect.\", \"All entries in this range are incorrect.\"),\n range_credit=1,\n if(len(cells)=1, \"This entry is correct.\", \"All entries in this range are correct.\"),\n //otherwise\n \"Some entries in this range are correct.\"\n ),\n assert(len(cells)=0, add_credit(range_credit*w, \"{name}: \"+message)); \n range_credit\n ),\n [cells,w,name],\n zip(range_cells, range_weights, keys(settings[\"mark_ranges\"]))\n)"}, {"name": "notation_styles", "description": "Accepted number notation styles for a value in an individual cell.
", "definition": "[\"plain\",\"si-en\"]"}], "settings": [{"name": "initial_sheet", "label": "Initial sheet", "help_url": "", "hint": "Aspreadsheet object giving the initial state of the sheet that the student should fill in.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "correct_answer", "label": "Correct answer", "help_url": "", "hint": "A spreadsheet object representing a correct answer to the part.", "input_type": "code", "default_value": "", "evaluate": true}, {"name": "disable_ranges", "label": "Ranges to disable", "help_url": "", "hint": "A list of cell or range references, denoting the cells that should not be editable.", "input_type": "code", "default_value": "[]", "evaluate": true}, {"name": "mark_ranges", "label": "Ranges to mark", "help_url": "", "hint": "A dictionary of cell or range references, mapping names to ranges of cells, denoting the cells that should be compared for equality with the expected answer.", "input_type": "code", "default_value": "dict()", "evaluate": true}, {"name": "marking_method", "label": "Marking method", "help_url": "", "hint": "", "input_type": "dropdown", "default_value": "per_cell", "choices": [{"value": "per_cell", "label": "Each cell has the same weight"}, {"value": "per_range", "label": "Each range has the same weight"}]}, {"name": "tolerance", "label": "Allowed margin of error", "help_url": "", "hint": "", "input_type": "code", "default_value": "0", "evaluate": true}], "public_availability": "always", "published": true, "extensions": ["sheets"]}, {"source": {"pk": 1, "author": {"name": "Christian Lawson-Perfect", "pk": 7}, "edit_page": "/part_type/1/edit"}, "name": "Yes/no", "short_name": "yes-no", "description": "The student is shown two radio choices: \"Yes\" and \"No\". One of them is correct.
", "help_url": "", "input_widget": "radios", "input_options": {"correctAnswer": "if(eval(settings[\"correct_answer_expr\"]), 0, 1)", "hint": {"static": true, "value": ""}, "choices": {"static": true, "value": ["Yes", "No"]}}, "can_be_gap": true, "can_be_step": true, "marking_script": "mark:\nif(studentanswer=correct_answer,\n correct(),\n incorrect()\n)\n\ninterpreted_answer:\nstudentAnswer=0\n\ncorrect_answer:\nif(eval(settings[\"correct_answer_expr\"]),0,1)", "marking_notes": [{"name": "mark", "description": "This is the main marking note. It should award credit and provide feedback based on the student's answer.", "definition": "if(studentanswer=correct_answer,\n correct(),\n incorrect()\n)"}, {"name": "interpreted_answer", "description": "A value representing the student's answer to this part.", "definition": "studentAnswer=0"}, {"name": "correct_answer", "description": "", "definition": "if(eval(settings[\"correct_answer_expr\"]),0,1)"}], "settings": [{"name": "correct_answer_expr", "label": "Is the answer \"Yes\"?", "help_url": "", "hint": "An expression which evaluates totrue or false.", "input_type": "mathematical_expression", "default_value": "true", "subvars": false}], "public_availability": "always", "published": true, "extensions": []}], "resources": [["question-resources/Numbat_Face_U5OjlWd.jpg", "/srv/numbas/media/question-resources/Numbat_Face_U5OjlWd.jpg"], ["question-resources/random-numbers_1yehVZF.svg", "/srv/numbas/media/question-resources/random-numbers_1yehVZF.svg"], ["question-resources/numbas-randomised-prices_PqUkZL7.svg", "/srv/numbas/media/question-resources/numbas-randomised-prices_PqUkZL7.svg"]]}