开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)｜3.2.5(安卓)APP下载

返回

Victoriazhang · 2021年09月08日

A选项是什么意思呢，可以还讲一下么

  1. CFA I
  2. Quantitative

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.

A选项需要仔细讲一下

添加评论
1 个答案

星星_品职助教 · 2021年09月08日

同学你好，

A选项说反了，应该是“The p-value is the smallest level of significance at which the null hypothesis would be rejected.”

这句话的意思是p-value是可以去拒绝原假设的最小的significance level。例如p-value等于2.7%，这个2.7%就是可以去拒绝的最小值。如果significance level此时比这个最小值还都要小，那就拒绝不了了。

换而言之，此时significance level就必须要比2.7%大才可以去拒绝原假设。

上述思维比较抽象，可以举个例子进行总结。只要significance level大于了p-value，就拒绝原假设。例如本例中significance level如果等于5%，大于了2.7%，就直接拒绝原假设。

如果不拒绝原假设，那么significance level就要小于p-value。例如本例中significance level如果等于1%，小于了2.7%，就无法拒绝。

从考试的角度，需要掌握：1）A选项的正确描述方法；2）p-value＜significance level等价于直接拒绝原假设；其中第2）条更重要一些。



  • 1

    回答

  • 0

    关注

  • 642

    浏览
相关问题

NO.PZ2018062016000135问题如下Accorng to the following statements on p-value, whiis less correct?A.The p-value is the largest level of significanwhithe null hypothesis woulrejecte B.The lower the p-value, the stronger the evinfor rejecting the null hypothesis. C.The p-value hthe usuvalue, but not stable. A is the correanswer. The p-value is the smallest level of significanwhithe null hypothesis crejectefor a given value of the test statisti 。。。。。。。。。。。

2024-02-19 18:52 1 · 回答

NO.PZ2018062016000135问题如下Accorng to the following statements on p-value, whiis less correct?A.The p-value is the largest level of significanwhithe null hypothesis woulrejecte B.The lower the p-value, the stronger the evinfor rejecting the null hypothesis. C.The p-value hthe usuvalue, but not stable. A is the correanswer. The p-value is the smallest level of significanwhithe null hypothesis crejectefor a given value of the test statisti A不知道为什么是答案

2024-02-18 20:05 1 · 回答

NO.PZ2018062016000135问题如下Accorng to the following statements on p-value, whiis less correct?A.The p-value is the largest level of significanwhithe null hypothesis woulrejecte B.The lower the p-value, the stronger the evinfor rejecting the null hypothesis. C.The p-value hthe usuvalue, but not stable. A is the correanswer. The p-value is the smallest level of significanwhithe null hypothesis crejectefor a given value of the test statisti 求a，大于小于是指绝对值吗

2024-02-16 03:57 1 · 回答

NO.PZ2018062016000135 问题如下 Accorng to the following statements on p-value, whiis less correct? A.The p-value is the largest level of significanwhithe null hypothesis woulrejecte B.The lower the p-value, the stronger the evinfor rejecting the null hypothesis. C.The p-value hthe usuvalue, but not stable. A is correct. The p-value is the smallest level of significanwhithe null hypothesis crejectefor a given value of the test statisti

2023-05-27 15:37 1 · 回答