// Numbas version: finer_feedback_settings
{"name": "Hypothesis testing: write a hypothesis", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Hypothesis testing: write a hypothesis", "tags": [], "metadata": {"description": "<p>Setting up a formal hypothesis test in a variety of contexts.</p>", "licence": "None specified"}, "statement": "<p>You are investigating the effect of a {treatment[a]} on {alterperformance[a]}.&nbsp; You plan to compare the means of your control and experimental groups using an independent means t-test at the $\\alpha$=0.05 level.<br/><br/><br/></p>", "advice": "<p>Null Hypothesis, $H_0$: The {treatment[a]} {no} effect on {alterperformance[a]}.</p>\n<p>Alternative Hypothesis: $H_1$: The {treatment[a]} {an} effect on {alterperformance[a]}.</p>\n<p><br/><br/>NB: $H_1$ and $H_a$ are equivalent, and both correct, you may choose the one you prefer.</p>\n<p><strong></strong></p>", "rulesets": {}, "extensions": [], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"t1": {"name": "t1", "group": "true and false answers", "definition": "if(p<0.05,1,0)", "description": "", "templateType": "anything", "can_override": false}, "f1": {"name": "f1", "group": "true and false answers", "definition": "abs(1-t1)", "description": "", "templateType": "anything", "can_override": false}, "t2": {"name": "t2", "group": "true and false answers", "definition": "if(0.05<p<0.1,1,0)", "description": "", "templateType": "anything", "can_override": false}, "f2": {"name": "f2", "group": "true and false answers", "definition": "abs(1-t2)", "description": "", "templateType": "anything", "can_override": false}, "t3": {"name": "t3", "group": "true and false answers", "definition": "if(p<0.01,1,0)", "description": "", "templateType": "anything", "can_override": false}, "f3": {"name": "f3", "group": "true and false answers", "definition": "abs(1-t3)", "description": "", "templateType": "anything", "can_override": false}, "alterperformance": {"name": "alterperformance", "group": "question variables", "definition": "[\"dandruff levels\", \"VO2-max levels in sprint athletes\", \"anxiety levels\", \"slug populations\", \"hand-eye coordination\", \"body mass index\", \"lower back pain\", \"skin hydration\", \"student test scores\", \"the wild boar population\", \"average reading level at age 6\"]   ", "description": "", "templateType": "anything", "can_override": false}, "treatment": {"name": "treatment", "group": "question variables", "definition": "[\"medicated shampoo\", \"training programme\", \"herbal remedy\", \"biological treatment\", \"caffine intake\", \"hydration levels\", \"new treatment\", \"water spray\", \"teaching style\", \"predator numbers\" , \"library access\"]", "description": "", "templateType": "anything", "can_override": false}, "significant": {"name": "significant", "group": "question variables", "definition": "if(sig=\"2\"or sig=\"3\", \"significant\", \"not significant\")", "description": "", "templateType": "anything", "can_override": false}, "p": {"name": "p", "group": "statistics", "definition": "if(\nsig=3, random(0.0001..0.01 #0.001),\nif(\nsig=2, random(0.011..0.049 #0.001),\nif( sig=1, random(0.06..0.10 #0.001),\nrandom(0.11..1 #0.001))))\n\n", "description": "", "templateType": "anything", "can_override": false}, "sig": {"name": "sig", "group": "question variables", "definition": "random(0,1,2,3)", "description": "", "templateType": "anything", "can_override": false}, "n": {"name": "n", "group": "statistics", "definition": "random(5..100 #5)\n", "description": "", "templateType": "anything", "can_override": false}, "t": {"name": "t", "group": "statistics", "definition": "\"need formula for this\"", "description": "", "templateType": "anything", "can_override": false}, "df": {"name": "df", "group": "statistics", 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["alterperformance", "treatment", "significant", "sig", "tails", "a", "no", "an"]}, {"name": "statistics", "variables": ["n", "t", "p", "df"]}], "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>State the Null Hypothesis:</p>\n<p>[[0]]:&nbsp;</p>\n<p>The {treatment[a]} [[1]] effect on {alterperformance[a]}.</p>\n<p></p>\n<p></p>\n<p></p>\n<p></p>", "gaps": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, 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["1", 0], "distractors": ["", ""]}], "sortAnswers": false}, {"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>State the Alternative Hypothesis:</p>\n<p>[[0]]:&nbsp;</p>\n<p>The {treatment[a]} [[1]] effect on {alterperformance[a]}.</p>\n<p></p>\n<p></p>", "gaps": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, 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