考点

问题如下：

Question With respect to multiple linear regression, a partial regression coefficient describes the impact of a change in the respective independent variable on the dependent variable, holding:

选项：

A.A.the intercept coefficient equal to zero.

B.B.all other independent variables constant.

C.C.the respective slope coefficient equal to zero.

解释：

• A is Incorrect because, when interpreting a partial regression coefficient, no specific assumptions about the intercept are required.

• B is Correct because a slope coefficient in a multiple regression, known as a partial regression coefficient or a partial slope coefficient, must be interpreted with care. A partial regression coefficient describes the impact of that independent variable on the dependent variable, holding all the other independent variables constant.

• C is Incorrect because the slope coefficient is the same as the partial regression coefficient, and is not assumed to be equal to zero.