题目

RxC列联表X2检验的自由度为:( )A. R-1B. C-1C. R+C-1D. R×C-1E. (R-1)(C-1)

RxC列联表X2检验的自由度为:( )

A. R-1

B. C-1

C. R+C-1

D. R×C-1

E. (R-1)(C-1)

题目解答

答案

E. (R-1)(C-1)