Question: If an independent variable (x) is added to a multiple regression model, the R 2 value becomes larger or smaller depending on how useful the

If an independent variable (x) is added to a multiple regression model, theR2

value

becomes larger or smaller depending on how useful the variable is.

is not affected by the variable added even if it is useful.

might or might not become larger even if the variable added is useful.

becomes larger even if the variable added is not useful.

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