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【单选题】
对于方差分析中的交互作用来说,下列说法错误的是( )
A.
如果一个因素的效应大小在另一个因素不同水平下明显不同，则称为两因素间存在交互作用
B.
当存在交互作用时，单纯研究某个因素的作用是没有意义的
C.
对两个因素的交互作用进行分析时，两个因素每个水平组合下至少要进行两次试验
D.
对于交互用的检验通常用卡方检验
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