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Ash · 2022年10月12日

卡方

NO.PZ2021071601000002

问题如下:

An analyst group follows 250 firms and classifies them in two dimensions. First dimension is financial leverage, and the second dimension is growth/value types.

To test whether the growth/value typles and financial leverage groups are independent of one another, what is the appropriate test statistic to use in this type of test?

选项:

A.Chi-square test B.T test
C.F test

解释:

A is correct

The appropriate test statistic is :


where Oij represents the observed frequency for the i and j group and Eij represents the expected frequency for the i and j group if the groupings are independent.

本题选用的检验量为卡方检验。

卡方检验不是用来检验单个样本的吗?

1 个答案

星星_品职助教 · 2022年10月12日

同学你好,

卡方检验有两个方面的应用:

1)检验方差是否等于一个固定的数字;

2)检验独立性,即本题的情况。

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