// Numbas version: exam_results_page_options
{"name": "Confidence Interval Q1.", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Confidence Interval Q1.", "tags": [], "metadata": {"description": "", "licence": "None specified"}, "statement": "<p>A business is concerned about the size of expenses claims being made by its staff. If the mean claim is over &pound;240 they will need to take some action to stop staff spending so much. A random sample of 400 expenses claims had a mean value of &pound;230 and a standard deviation of &pound;42.</p>\n<p>Calculate confidence intervals for the &lsquo;true mean&rsquo; size of expenses claims</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>with 95% confidence</p>", "minMarks": 0, "maxMarks": 0, "shuffleChoices": false, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["<p><strong>(&pound;225.88, &pound;234.12)</strong></p>", "<p><strong>(&pound;225.00, &pound;235.00)</strong></p>", "<p><strong>(&pound;224.88, &pound;235.12)</strong></p>", "<p><strong>(&pound;225.20, &pound;234.35)</strong></p>"], "matrix": ["5", 0, 0, 0], "distractors": ["", "", "", ""]}, {"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>with 99% confidence</p>", "minMarks": 0, "maxMarks": 0, "shuffleChoices": false, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["<strong>(&pound;224.00, &pound;235.00)</strong>", "<strong>(&pound;224.59, &pound;235.41)</strong>", "<strong>(&pound;225.59, &pound;236.41)</strong>", "<strong>(&pound;224.90, &pound;235.80)</strong>"], "matrix": ["0", "5", 0, 0], "distractors": ["", "", "", ""]}], "contributors": [{"name": "Shihan Miah", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/4456/"}]}]}], "contributors": [{"name": "Shihan Miah", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/4456/"}]}