题目内容
Wilcoxon符号秩和检验中，其无效假设为
2022-01-04
A.差值的总体均数为0
B.差值的总体中位数不为0
C.差值的总体均数不为0
D.差值的总体中位数为0
E.差值的样本均数不为0
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