CFA一級定量分析例題chi-square test of independence

發布時間：2025-06-26 15:04編輯：融躍教育CFA

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

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.

答案：A

解析：Ais 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.

關聯考點：Parametric and Non-Parametric Tests of Independence

易錯點分析：

通常，我們使用列聯表來檢驗兩個特征之間是否存在獨立性，例如在一個包含earnings growth和dividend yield的表中。原假設是這兩個特征是獨立的；檢驗的自由度由兩個特征的組數決定，計算公式為自由度df = (r-1)(c-1)，其中r和c分別是兩個特征的組數。

cfa一級例題分析

關鍵詞： CFA一級真題

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