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Thea.Yu · 2023年05月27日

请问B怎么理解,比如significant level是5%,那如果P-value为2%不是比P-value为3%离原假设更远吗

NO.PZ2018062016000135

问题如下:

According to the following statements on p-value, which is less correct?

选项:

A.

The p-value is the largest level of significance at which the null hypothesis would be rejected.

B.

The lower the p-value, the stronger the evidence for rejecting the null hypothesis.

C.

The p-value has the usual value, but not stable.

解释:

A is correct. The p-value is the smallest level of significance at which the null hypothesis can be rejected for a given value of the test statistic.



1 个答案

星星_品职助教 · 2023年05月27日

同学你好,

B选项即上课时讲过的结论“P越小越拒绝”。

由于拒绝原假设的条件为:p-value<significance level。所以p-value越小,就距离significance level越远,小的越多。就更容易拒绝原假设。

以提问中的significance level=5%为例,p-valule为2%距离5%更远(相比p-value=3%),即更容易拒绝。

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