A multiple regression analysis with 20 observations on each of three independent variables and the dependent variable would yield ______ and _______ degrees of freedom, respectively, for regression (explained) the error.

A) 3, 20

B) 3, 19

C) 3, 17

D) 4, 16

E) 3, 16

Which one of the following is not an assumption about the residuals in a regression model?

A) Variance of zero

B) Constant variance

C) Mean of zero

D) Independence

E) Normality

The ________ measures the proportion of the variation in the dependent variable explained by the multiple regression model.

A) correlation coefficient

B) coefficient of determination

C) standard error

D) total variation

E) F test