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GID0994.gifAt the end of last semester, all 33 students (11 from each of 3 sections) of a particular course were asked how many hours per week they spent studying for the course. This data was combined with the number of points earned by each student in the course. This information is presented in the graph.Grades in the course were calculated using a 20-point scale. To compute the grade, the number of points earned in the course was divided by 50 and then rounded up to the next whole number.Use the drop-down menus to complete each statement so that it is consistent with the information provided.The median reported time spent studying for all students in the course was hours per week.Section had the smallest average (arithmetic mean) reported time spent studying per week.
正确答案: 3,C

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    知识点概述
    本题涉及统计学中的中位数(median)和平均数(arithmetic mean)概念,以及对图表数据的读取和分析能力。 解析
    - 求中位数:总共有33个学生,中位数是第17个数据。将所有学生按每周学习小时数从小到大排列,通过观察图表可得中位数为3小时。 - 比较平均数:观察图表中各部分数据分布,Section A 的学习时间普遍较低,可判断其平均学习时间最小。 综上,第一个空填3,第二个空填A。

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