开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)|3.2.5(安卓)APP下载

veronica_gxy · 2021年04月17日

为什么累积相对频率不用考虑题中的下限

NO.PZ2017092702000041

问题如下:

An analyst is using the data in the following table to prepare a statistical report.

The cumulative relative frequency for the interval -1.71% ≤ x < 2.03% is closest to:

选项:

A.

0.250.

B.

0.333.

C.

0.583.

解释:

C is correct.

The cumulative relative frequency of an interval identifies the fraction of observations that are less than the upper limit of the given interval. It is determined by summing the relative frequencies from the lowest interval up to and including the given interval. The following table shows the relative frequencies for all the intervals of the data from the previous table:

如题、为什么累积相对频率不用考虑题中的下限
1 个答案
已采纳答案

星星_品职助教 · 2021年04月17日

同学你好,

累积概率是小于上限值的所有值的累积,正因为概率是一直累积到上限值的,所以下限值是什么都无所谓,即不受下限的影响。