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AroDing · 2024年10月30日

F检验的原假设不也是两个independent吗

  1. CFA I
  2. Quantitative

NO.PZ2023061301000027

问题如下：

Which of the following statements is correct regarding the chi-square test of

independence?

选项：

A.

The test has a one-sided rejection region.

B.

The null hypothesis is that the two groups are dependent.

C.

If there are two categories, each with three levels or groups, there are six

degrees of freedom.

解释：

A is correct. The test statistic includes squared differences between the observed and expected values, so the test involves only one side, the right side.

B is incorrect because the null hypothesis is that the groups are independent, and C is incorrect because with three levels of groups for the two categorical variables, there are four degrees of freedom.

什么时候用卡方检验什么时候用F检验呢？

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1 个答案

品职助教_七七 · 2024年10月31日

嗨，努力学习的PZer你好：


检验独立性应使用卡方检验，和F检验没有关系。

F检验主要检验两个方差之间的关系。

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