問題詳情

30. (5%) The following is a joint probability table between two categorical variables.the education level and the exercise frequency.

Which of the following statements is correct?
(A) If the table is from a large survey and can be treated as population data, we can saythat the two variables are not independent
(B) If the table is derived from sample data, we can test the independence of the twovariables using X2 test. The alternative hypothesis for the test is the independence ofthe two variables
(C) If the table is derived from s sample data, the degree of freedom of the nulldistribution of the X2  test is 9
(D) If the table is derived from sample data, the x? test statistic for testing theindependence of the two variables is


(E) TheX2  test assumes that the samples categorized into the same cell are correlated 

參考答案

答案：A
難度：計算中-1
書單：沒有書單，新增