// Numbas version: finer_feedback_settings
{"name": "Two Sample Hypothesis Test Revision", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Two Sample Hypothesis Test Revision", "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "<p>The management in a large chain of shops aims to reduce the level of absenteeism among its staff. The management looks at two locations, a city centre shop in Manchester and a shop in Edinburgh.</p>\n<p>The company take a sample of 8 employee records in Manchester and record how many days each employee has been absent over the previous year. They find that the sample mean is 7 days with a sample standard deviation of 1.2</p>\n<p>They take a sample of 10 employees in Edinburgh and find that the sample mean is 6.2 with a sample standard deviation of 1.8. Carry out a two-sample t-test at a 5% significance level to determine if there is a difference in absenteeism between the two locations</p>", "advice": "", "rulesets": {}, "extensions": [], "variables": {}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": [], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "showCorrectAnswer": true, "showFeedbackIcon": true, "scripts": {}, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "adaptiveMarkingPenalty": 0, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "prompt": "<p>What is the null hypothesis?</p>", "minMarks": 0, "maxMarks": 0, "shuffleChoices": false, "displayType": "dropdownlist", "displayColumns": 0, "showCellAnswerState": true, "choices": ["<p>There is no difference between the stores.</p>", "<p>There is difference between the stores</p>"], 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