gwd set 13-19

applebees

Q19:
Yesterday each of the 35 members of a certain task force spent some time working on project P. The graph shows the number of hours and the number of members who spent that number of hours working on project P yesterday. What was the median number of hours that the members of the task force spent working on project P yesterday?

A. 2

B. 3

C. 4

D. 5

E. 6

Answer: e

I have no idea ,

apply1

偶觉得中数也不难啊,就是有一半的数大于它,有一半的数小于它啊!

像这题中数是第18位,不就好办拉

chinabens

为什么不是直接将number of hours排序，然后取中数呢？也就是直接按横轴排序。

这里两个变量，一个是人数，一个是小时，如何从题目知道median是对谁而言呢？

我觉得我对中数非常困惑。请NN指教！

luoye1

由y轴得总人数35个，第18个为media，正好落在x轴的第6上。