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【单选题】
三个样本频率比较, χ 2 > χ 2 0.01(2) ,可以认为?
A.
各总体频率不等或不全相等
B.
各总体频率均不相等
C.
各样本频率均不相等
D.
各样本频率不等或不全相等
E.
各总体频率相等
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