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chyje2007 · 2018年08月31日

问一道题:NO.PZ2015120604000178 [ CFA I ]

问题如下图:

选项:

A.

B.

C.

解释:

想请问老师我做这道题时第一反应没有想到用什么方法来解答,能给个这道题用什么方法解答的具体思路吗

1 个答案

菲菲_品职助教 · 2018年08月31日

同学你好,这道题目存在一点问题,我们已经在后台修改,不过原理是一样的,当我们得知总体均值及方差的时候,又是正态分布的情况下,让我们求样本的相关东西,我们就要联想到中心极限定理,求出样本的标准误,再由求出来的统计量去对应查表找到相应的概率。

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