In a multiple regression problem involving two independent variables, if b1 is computed to be +2.0, it means that:
A) the relationship between X1 and Y is significant.
B) the estimated value of Y increases by an average of 2 units for each increase of 1 unit of X1, holding X2 constant.
C) the estimated value of Y increases by an average of 2 units for each increase of 1 unit of X1, without regard to X2.
D) the estimated average value of Y is 2 when X1 equals zero.
B
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