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{"name": "James's copy of Descriptive Statistics (P): Mean", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "James's copy of Descriptive Statistics (P): Mean", "showQuestionGroupNames": false, "advice": "<h4>a)</h4>\n<p>To find the mean you first need to sum the numbers, i.e.:</p>\n<p>\\[ \\simplify[]{{a}+{b}+{c}}&nbsp;= \\var{a+b+c} \\]</p>\n<p>Then divide through by the number of values being summed:</p>\n<p>\\[ \\text{Mean} = \\simplify{{a+b+c}/3}&nbsp;\\]</p>\n<h4>b)</h4>\n<p>The mean is</p>\n<p>\\[ \\simplify[]{({a}+{b}+{f}+{c}+{d})/5} = \\simplify[fractionnumbers]{{(a+b+f+c+d)/5}} \\]</p>", "rulesets": {}, "type": "question", "statement": "<p>Find the <strong>means</strong> of the following sets of numbers. Enter your answers as decimals to <strong>two</strong> significant figures.</p>", "functions": {}, "preamble": {"js": "", "css": ""}, "variable_groups": [], "parts": [{"allowFractions": false, "maxValue": "(a+b+c)/3", "marks": 1, "strictPrecision": true, "type": "numberentry", "variableReplacements": [], "precisionPartialCredit": 0, "prompt": "<p>$\\var{a}, \\var{b}, \\var{c}$</p>", "showCorrectAnswer": true, "precisionType": "sigfig", "correctAnswerFraction": false, "showPrecisionHint": false, "precisionMessage": "You have not given your answer to the correct precision.", "variableReplacementStrategy": "originalfirst", "scripts": {}, "precision": "2", "minValue": "(a+b+c)/3"}, {"allowFractions": false, "maxValue": "(a+b+c+f+d)/5", "marks": 1, "strictPrecision": true, "type": "numberentry", "variableReplacements": [], "precisionPartialCredit": 0, "prompt": "<p>$\\var{a},\\var{b},\\var{f},\\var{c},\\var{d}$</p>", "showCorrectAnswer": true, "precisionType": "sigfig", "correctAnswerFraction": false, "showPrecisionHint": false, "precisionMessage": "You have not given your answer to the correct precision.", "variableReplacementStrategy": "originalfirst", "scripts": {}, "precision": "2", "minValue": "(a+b+c+f+d)/5"}], "variables": {"d": {"name": "d", "definition": "random(11..15)", "description": "", "templateType": "anything", "group": "Ungrouped variables"}, "b": {"name": "b", "definition": "random(1..9)", "description": "", "templateType": "anything", "group": "Ungrouped variables"}, "c": {"name": "c", "definition": "random(1..9)", "description": "", "templateType": "anything", "group": "Ungrouped variables"}, "f": {"name": "f", "definition": "random(11..15)", "description": "", "templateType": "anything", "group": "Ungrouped variables"}, "a": {"name": "a", "definition": "random(1..9)", "description": "", "templateType": "anything", "group": "Ungrouped variables"}}, "tags": [], "metadata": {"licence": "Creative Commons Attribution 4.0 International", "description": "<p>Compute the means of two small samples.</p>"}, "variablesTest": {"condition": "", "maxRuns": 100}, "extensions": [], "question_groups": [{"name": "", "pickQuestions": 0, "pickingStrategy": "all-ordered", "questions": []}], "ungrouped_variables": ["a", "b", "c", "d", "f"], "contributors": [{"name": "James McEvoy", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/922/"}]}]}], "contributors": [{"name": "James McEvoy", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/922/"}]}