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大蒙 · 2018年09月02日

问一道题:NO.PZ2015120604000137 [ CFA I ]

问题如下图:老师你好,这道题不能理解

备择假设是大于46435,也就是拒绝域在1.89的右边。而0.5%,5%,1%三个显著性水平对应的critical value分别是2.34,1.64,2.33。这样跟1.89比的话,第一个和第三个不是都落在拒绝域要拒绝的吗?

    

选项:

A.

B.

C.

解释:



1 个答案

菲菲_品职助教 · 2018年09月03日

同学你好,你这边概念弄反啦。拒绝域是在临界值右边而不是在统计量右边哦。这道题的1.89是计算出来的统计量,所以只有1.89大于临界值时才会拒绝原假设,那么这边就只有一个选项符合情况啦。

大蒙 · 2018年09月03日

哦,对的😂谢谢老师!

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