// Numbas version: exam_results_page_options
{"name": "Feedback loop: how close are you?", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Feedback loop: how close are you?", "tags": [], "metadata": {"description": "<p>Demonstrating a kind of feedback loop in a Numbas part: you're told how close you are to the correct answer.</p>", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "", "advice": "", "rulesets": {}, "extensions": [], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"expr": {"name": "expr", "group": "Ungrouped variables", "definition": "simplify(expression(\"{a}*sin({b}*x) + {c}*x^2+{a*b*c}\"), \"all\")", "description": "", "templateType": "anything", "can_override": false}, "a,b,c": {"name": "a,b,c", "group": "Ungrouped variables", "definition": "repeat(random(-5..5),3)", "description": "", "templateType": "anything", "can_override": false}, "m1": {"name": "m1", "group": "Ungrouped variables", "definition": "random(0..b1-1)", "description": "", "templateType": "anything", "can_override": false}, "m2": {"name": "m2", "group": "Ungrouped variables", "definition": "random(0..b2-1)", "description": "", "templateType": "anything", "can_override": false}, "m3": {"name": "m3", "group": "Ungrouped variables", "definition": "random(0..b3-1)", "description": "", "templateType": "anything", "can_override": false}, "b1,b2,b3": {"name": "b1,b2,b3", "group": "Ungrouped variables", "definition": "shuffle([3,5,7,11,13])", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["a,b,c", "b1,b2,b3", "expr", "m1", "m2", "m3"], "variable_groups": [], "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": "<p>Find, to 3 decimal places, a root of the following function:</p>\n<p>\\[ f(x) = \\var{expr} \\]</p>\n<p>$x = $ [[0]]</p>", "gaps": [{"type": "numberentry", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "student_y: eval(expr, [\"x\": studentnumber])\n\nerror: abs(student_y)\n\nmark:\n  apply(validNumber);\n  if(error<10^-3,\n    correct(\"$f(x) = \"+dpformat(student_y,3)+\"$, to three decimal places.\")\n  ,\n    negative_feedback(\"$f(x) = \"+dpformat(student_y,3)+\"$. Refine your answer and try again.\")\n  )", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": false, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "minValue": "0", "maxValue": "0", "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", "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}]}]}], "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}]}