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SiM · 2020年07月11日

问一道题:NO.PZ2018062016000131 [ CFA I ]

问题如下:

In the steps of hypothesis testing, which of the following descriptions on the statistically significant result is most accurate?

选项:

A.

When we test the null hypothesis, the caculated value of the test statistic is less extreme than a given value.

B.

When we accept the null hypothesis, we can get a statistically significant result.

C.

When we reject the null hypothesis, the result is statistically significant.

解释:

C is correct. When we test the null hypothesis, if we find that the calculated value of the test statistic is as extreme or more extreme than a give value or values determined by the specified level of sigificance, we reject the null hypothesis, we say the result is statistically significant.

请问A选项 is less extreme than 的意思不应该是和给定值相比没那么极端嘛?为什么是小于给定值呢?
1 个答案

星星_品职助教 · 2020年07月12日

同学你好,

...is less extreme than 的意思就是你理解的和给定值相比没那么极端, 也就是说无论正负值,给定值(critical value)更极端一些,正值的话就是给定值更大,负值的话就是给定值更小,所以不能拒绝原假设。

 

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