题目内容

在建立多元回归模型时,变量的选择方法中,( )

A. 向前选择变量的方法是不停地向模型中减少自变量,直到减少自变量不能导致SSE显著增加。
B. 向后剔除变量的方法是不停地向模型中增加自变量,直到增加自变量不能导致SSE显著减少。
C. 逐步回归选择变量的方法是将向前选择法和向后剔除法结合起来,不断向模型中增加或剔除自变量,直到增加或剔除自变量不能导致SSE显著增加或减少。
D. 在采用向前选择法、向后剔除法、逐步回归法,进行变量选择中,增加或减少自变量,使多元回归残差平方和SSE增加或减少的显著性检验,采用的都是t检验。

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