In a Multiple Regression Problem Involving Two Independent Variables, If

Multiple Choice

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 mean of Y increases by 2 units for each increase of 1 unit of X1, holding X2 constant.
C) the estimated mean of Y increases by 2 units for each increase of 1 unit of X1, without regard to X2.
D) the estimated mean of Y is 2 when X1 equals zero.