发布时间:2023-07-15 15:02来源: 融跃教育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.
(数量 Hypothesis Testing)
通常是根据一个列联表来检验表中的两个特征是否独立,比如这个表中的earnings growth和dividend yield是否独立;原假设是两个特征独立(independent); 自由度是(r-1)(c-1),r和c分别是两个特征的组数,A中强调one-sided,意思是拒绝域都在一边。
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