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SkipperLin · 2020年03月07日

问一道题:NO.PZ2020011101000054

问题如下:

A random draw from an N(1,5) distribution is 1.2. If this was generated using the inverse of the cumulative distribution approach, what is the original draw from the U(0,1) distribution?

选项:

解释:

Essentially, the question is to determine the cumulative distribution up to 1.2 on an N(1,5) distribution. This can be done with the Excel function NORMDIST(1.2,1,sqrt(5),True) and returns the value 0.535.

请问我把(1.2-1)/sqrt5 = 0.08944带入带normal distribution的z score table里面找表里面的值是0.08944找的跟答案查很多 错在哪里了

1 个答案
已采纳答案

品职答疑小助手雍 · 2020年03月07日

同学你好,你这个0.0894可以约等于0.09是指距离均值向正方向标准差的倍数,在正态分布表里找的就是第一行0.0,对应的0.09那一列的数值,也就是0.0535。

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