Question: Removing an existing predictor variable from a regression model: A.Can never increase R-squared B.Can never decrease R-squared C.Has never any effect on R-squared D.Changes R-squared

Removing an existing predictor variable from a regression model:

A.Can never increase R-squared

B.Can never decrease R-squared

C.Has never any effect on R-squared

D.Changes R-squared by either increasing or decreasing it

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