Question: In a multiple regression problem involving two explanatory variables X 1 and X 2 and a response variable Y, if b1 is computed to be

In a multiple regression problem involving two explanatory variables X1and X2and a response variable Y, if b1 is computed to be +2.0, it means that

Y increases by 2 units for each increase of 1 unit of X1when X2is not included as an explanatory variable.

the predicted value of Y is 2 when X1equals zero.

the relationship between X1and Y is 2 times as significant as the relationship between X2and Y.

Y increases by 2 units for each increase of 1 unit of X1, holding X2constant.

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