如果运用proc means过程分析变量weight,height,下面哪个语句是正确的? ()A.var weight, height;B.class weight, height;C.output weight, height;D.by weight, height;

如果运用proc means过程分析变量weight,height,下面哪个语句是正确的? ()

A.var weight, height;

B.class weight, height;

C.output weight, height;

D.by weight, height;


参考答案和解析
D

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