问题:试说命令TABLE id1*sex*edc中3个变量的作用。...
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问题:什么是“第二类错误(Type Ⅱ error)”?...
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问题:SAS用什么命令定义变量标签?变量标签处于程序的第几行?...
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问题:理论的显著性水平(α值)是什么?有几种水平选择?...
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