// Numbas version: finer_feedback_settings
{"name": "Simon's copy of Cumulative frequency", "extensions": [], "custom_part_types": [], "resources": [["question-resources/Q11_cumlative_frequnecy_1.jpg", "/srv/numbas/media/question-resources/Q11_cumlative_frequnecy_1.jpg"], ["question-resources/Q11_cumlative_frequnecy.jpg", "/srv/numbas/media/question-resources/Q11_cumlative_frequnecy.jpg"], ["question-resources/Q11_cumlative_frequnecy_2.jpg", "/srv/numbas/media/question-resources/Q11_cumlative_frequnecy_2.jpg"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"variable_groups": [], "statement": "<p>The cumulative frequency diagram gives information about the time, in minutes, 50 people were kept waiting at hospital.</p>\n<p><img src=\"resources/question-resources/Q11_cumlative_frequnecy_2.jpg\"/></p>", "preamble": {"js": "", "css": ""}, "extensions": [], "parts": [{"unitTests": [], "scripts": {}, "marks": 1, "showCorrectAnswer": true, "minValue": "10", "correctAnswerStyle": "plain", "showFeedbackIcon": true, "prompt": "<p>How many people waited less than 20 minutes?</p>", "correctAnswerFraction": false, "notationStyles": ["plain", "en", "si-en"], "mustBeReduced": false, "allowFractions": false, "customMarkingAlgorithm": "", "maxValue": "10", "extendBaseMarkingAlgorithm": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "type": "numberentry"}, {"unitTests": [], "scripts": {}, "marks": "2", "showCorrectAnswer": true, "minValue": "22", "correctAnswerStyle": "plain", "showFeedbackIcon": true, "prompt": "<p>Give an estimate for the number of people who waited between 20 and 40 minutes.</p>", "correctAnswerFraction": false, "notationStyles": ["plain", "en", "si-en"], "mustBeReduced": false, "allowFractions": false, "customMarkingAlgorithm": "", "maxValue": "24", "extendBaseMarkingAlgorithm": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "type": "numberentry"}], "metadata": {"description": "<p>rebelmaths</p>", "licence": "Creative Commons Attribution 4.0 International"}, "rulesets": {}, "ungrouped_variables": [], "tags": [], "advice": "<p><strong>(a)</strong></p>\n<p><strong>How many people waited less than 20 minutes?</strong></p>\n<p>Looking at our cumulative frequency graph, we find 20 minutes on the x-axis. Then move vertically up&nbsp;until we reach the red cumulative frequency curve. Then move&nbsp;horizontally to the left&nbsp;to read of the value on the y-axis. The correct value is 10 people.</p>\n<p></p>\n<p><strong>(b)</strong></p>\n<p><strong>Give an estimate for the number of people who waited between 20 and 40 minutes.</strong></p>\n<p>As in part (a),&nbsp;we find 40 minutes on the x-axis. &nbsp;&nbsp;vertically up&nbsp;until we reach the red cumulative frequency curve. Then move&nbsp;horizontally to the left&nbsp;to read of the value on the y-axis. The&nbsp;corresponding value is&nbsp;approximately&nbsp;33 people.</p>\n<p>Since 10 people waited less than 20 minutes, and 33 people waited less than 40 minutes, that means 33-10 = 23 people waited between 20 and 40 minutes.</p>", "name": "Simon's copy of Cumulative frequency", "variables": {}, "functions": {}, "variablesTest": {"maxRuns": 100, "condition": ""}, "type": "question", "contributors": [{"name": "Julie Crowley", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/113/"}, {"name": "Simon Thomas", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/3148/"}]}]}], "contributors": [{"name": "Julie Crowley", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/113/"}, {"name": "Simon Thomas", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/3148/"}]}