R×C列联表χ2检验的自由度为()A.(R-1)(C-1) B.R+C-1

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问题 R×C列联表χ2检验的自由度为()A.(R-1)(C-1)B.R+C-1C.R-1D.R×C-1E.C-1

选项 A.(R-1)(C-1)
B.R+C-1
C.R-1
D.R×C-1
E.C-1

答案 A

解析
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