// Numbas version: finer_feedback_settings
{"name": "NC SP Year 9 absences Area chart (7)", "extensions": [], "custom_part_types": [], "resources": [["question-resources/Area_chart_cropped2.png", "/srv/numbas/media/question-resources/Area_chart_cropped2.png"], ["question-resources/Area_chart_600.png", "/srv/numbas/media/question-resources/Area_chart_600.png"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "NC SP Year 9 absences Area chart (7)", "tags": ["LANTITE"], "metadata": {"description": "<p>Used for LANTITE preparation (Australia). NC = Non Calculator strand.&nbsp;SP&nbsp;&nbsp;Statistics &amp; Probability strand. Students are shown an area chart and asked one of seven possible questions.</p>", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "statement": "<p>The number of absent Year 9 students was recorded by three schools, every day for one week. The area chart below shows the absences for the three schools for&nbsp;the week.</p>\n<p><img src=\"resources/question-resources/Area_chart_600.png\"/></p>", "advice": "<p><strong>General comment</strong></p>\n<p>It is not always straightforward to read the data from an area chart.</p>\n<p>The absences for School 1 can be read directly from the vertical axis.</p>\n<p>However, the absences for School 2 are shown by the height of the middle (dark blue) band at each day of the week. The lower reading must be subtracted from the upper reading. For example, there were 4 absences from School 2 on Monday, as 10 - 6 = 4.</p>\n<p>Similarly, the&nbsp;absences for School 3 are shown by the height of the&nbsp;top (yellow) band at each day of the week.&nbsp;For example, there were 2 absences from School 3 on Tuesday, as 16 - 14 = 2.</p>\n<p><strong>For this question:</strong></p>\n<p>{specificadvice}</p>", "rulesets": {}, "extensions": [], "variables": {"Scenarios": {"name": "Scenarios", "group": "Ungrouped variables", "definition": "json_decode(safe(\"[\\n{\\n\\\"question\\\":\\\"Which school had four students absent on three different days?\\\",\\n\\\"answer\\\":\\\"School 3\\\",\\n\\\"distractor1\\\":\\\"School 1\\\",\\n\\\"distractor2\\\":\\\"School 2\\\",\\n\\\"advice\\\":\\\"School 3 had 4 students absent on Monday, Thursday and Friday. \\\"\\n},\\n{\\n\\\"question\\\":\\\"Which school had the most students absent on Wednesday?\\\",\\n\\\"answer\\\":\\\"School 2\\\",\\n\\\"distractor1\\\":\\\"School 1\\\",\\n\\\"distractor2\\\":\\\"School 3\\\",\\n\\\"advice\\\":\\\"On Wednesday, School 1 had 6 absentees, School 2 had 8 absentees, and School 3 had only 2 absentees. Therefore School 2 had the most students absent on Wednesday.\\\"\\n},\\n{\\n\\\"question\\\":\\\"What was the total number of students absent from School 3 that week?\\\",\\n\\\"answer\\\":\\\"16\\\",\\n\\\"distractor1\\\":\\\"82\\\",\\n\\\"distractor2\\\":\\\"44\\\",\\n\\\"advice\\\":\\\"School 3 had daily absences of 4, 2, 2, 4, and 4. Therefore School 3 had 16 students absent that week.\\\"\\n},\\n{\\n\\\"question\\\":\\\"School 2 has 160 Year 9 students in total. What percentage of Year 9 students were absent from School 2 on Wednesday?\\\",\\n\\\"answer\\\":\\\"5%\\\",\\n\\\"distractor1\\\":\\\"8.75%\\\",\\n\\\"distractor2\\\":\\\"14%\\\",\\n\\\"advice\\\":\\\"School 2 had 8 absences out of 160 students. To convert this to a percentage, simplify the fraction 8/160 to get 1/20. 1/10 is equivalent to 10%, so 1/20 is equivalent to 5% of students absent from School 2 on Wednesday.\\\"\\n},\\n{\\n\\\"question\\\":\\\"What was the total number of students absent from School on Friday that week?\\\",\\n\\\"answer\\\":\\\"22\\\",\\n\\\"distractor1\\\":\\\"50\\\",\\n\\\"distractor2\\\":\\\"38\\\",\\n\\\"advice\\\":\\\"It is not necessary to add up the individual absences for the three schools. The combined absences of 22 can be read straight from the vertical axis of the graph. Twenty-two students were absent from School on Friday that week.\\\"\\n},\\n{\\n\\\"question\\\":\\\"What was the total number of students absent from School on Tuesday that week?\\\",\\n\\\"answer\\\":\\\"16\\\",\\n\\\"distractor1\\\":\\\"38\\\",\\n\\\"distractor2\\\":\\\"24\\\",\\n\\\"advice\\\":\\\"It is not necessary to add up the individual absences for the three schools. The combined absences of 16 can be read straight from the vertical axis of the graph. Sixteen students were absent from School on Tuesday that week\\\"\\n},\\n{\\n\\\"question\\\":\\\"On which day did the three schools have very similar absentee numbers?\\\",\\n\\\"answer\\\":\\\"Monday\\\",\\n\\\"distractor1\\\":\\\"Tuesday\\\",\\n\\\"distractor2\\\":\\\"Thursday\\\",\\n\\\"advice\\\":\\\"On Monday, the absences at Schools 1, 2 & 3 were 6, 4 and 4 respectively. All the other days had a much wider range of absences. Therefore the day with the most similar absentee numbers was Monday.\\\"\\n}\\n]\"))", "description": "<p>The list of all possible questions.</p>", "templateType": "json"}, "scenario": {"name": "scenario", "group": "Ungrouped variables", "definition": "random(scenarios)", "description": "<p>The randomly selected scenario (question, answer and advice combination).</p>", "templateType": "anything"}, "questiontext": {"name": "questiontext", "group": "Ungrouped variables", "definition": "scenario[\"question\"]", "description": "<p>The question text for the randomly selected scenario.</p>", "templateType": "anything"}, "correctanswer": {"name": "correctanswer", "group": "Ungrouped variables", "definition": "scenario[\"answer\"]", "description": "<p>The correct answer&nbsp;text for the randomly selected scenario.</p>", "templateType": "anything"}, "wrong1": {"name": "wrong1", "group": "Ungrouped variables", "definition": "scenario[\"distractor1\"]", "description": "<p>The&nbsp;first wrong answer text for the randomly selected scenario.</p>", "templateType": "anything"}, "wrong2": {"name": "wrong2", "group": "Ungrouped variables", "definition": "scenario[\"distractor2\"]", "description": "<p>The&nbsp;second wrong answer text for the randomly selected scenario.</p>", "templateType": "anything"}, "specificadvice": {"name": "specificadvice", "group": "Ungrouped variables", "definition": "scenario[\"advice\"]", "description": "<p>The&nbsp;advice&nbsp;text for the randomly selected scenario.</p>", "templateType": "anything"}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["Scenarios", "scenario", "questiontext", "correctanswer", "wrong1", "wrong2", "specificadvice"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "1_n_2", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p>{questiontext}</p>", "minMarks": 0, "maxMarks": 0, "shuffleChoices": true, "displayType": "radiogroup", "displayColumns": 0, "showCellAnswerState": true, "choices": ["{correctanswer}", "{wrong1}", "{wrong2}"], "matrix": ["1", 0, 0], "distractors": ["Well done!", "Have you correctly read the data on the vertical axis?", "Have you correctly read the data on the vertical axis?"]}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always", "type": "question", "contributors": [{"name": "Adelle Colbourn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/2083/"}]}]}], "contributors": [{"name": "Adelle Colbourn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/2083/"}]}