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标题: 请教此题何解 [打印本页]

作者: braveMBA 时间: 2005-7-22 06:42 标题: 请教此题何解

天山 5 - 7

number of members number of hours

9	1
4	2
1	3
2	4
1	5
8	6
10	7

yesterday each of the 35 members of a certain task force spent some time working on project P. the table shows the number of hours and the number of members who spent tha tnumber of hours working on project P yesterday. what was the median number of hours that the members of the task force spent working on the project P yesterday?

answer E. 6

怎么算出来的呀

谢

作者: himba 时间: 2005-7-22 12:53

把所有人按时间多少顺序排序, median是35个人里排中间的那个人所用时间,即第18th,上图中10个人用7小时,8个人用6小时,则第18位就是6HOUR.

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