// Numbas version: finer_feedback_settings
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"Ungrouped variables", "description": "", "definition": "random(126..130)", "templateType": "anything"}, "a5": {"name": "a5", "group": "Ungrouped variables", "description": "", "definition": "random(126..130 except a6)", "templateType": "anything"}, "a7": {"name": "a7", "group": "Ungrouped variables", "description": "", "definition": "random(131..140)", "templateType": "anything"}}, "ungrouped_variables": ["a1", "a3", "a2", "a5", "a4", "a7", "a6"], "statement": "<p>The fuel emissions (in g/km of CO2) of a sample of 7&nbsp;diesel cars of similar type have been recorded as follows:</p>\n<p>$\\var{a2}, \\var{a7}, \\var{a1}, \\var{a5}, \\var{a3}, \\var{a6}$ and $\\var{a4}$.</p>\n<p>Calculate the mean, median and mode of these emissions.<br/><br/></p>", "extensions": ["stats"], "advice": "<p>Mean: Add up all the numbers and divide by the number of numbers.</p>\n<p>Median: middle value</p>\n<p>Mode: most common value</p>\n<p></p>", "parts": [{"prompt": "<p>$\\text{mean}=\\;\\;$[[0]] (correct 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"css": ""}, "functions": {}, "tags": [], "name": "Michael's copy of Harry's copy of Exam version of Mean, Median, Mode for Auto", "metadata": {"licence": "Creative Commons Attribution 4.0 International", "description": "<div class=\"description\">\n<p>Topics covered are calculating the mean, median, mode and standard deviation.</p>\n<p>rebelmaths</p>\n</div>"}, "type": "question", "contributors": [{"name": "Julie Crowley", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/113/"}, {"name": "Michael Proudman", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/269/"}, {"name": "Harry Flynn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/976/"}]}]}], "contributors": [{"name": "Julie Crowley", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/113/"}, {"name": "Michael Proudman", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/269/"}, {"name": "Harry Flynn", "profile_url": 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