1. When additional independent variables are added to a multiple regression model, ________.

		R2 will always increase
		the independent variables will be correlated
		the coefficient of multiple determination decreases
		the adjusted R2 will always increase

2. Which of the following are true assumptions underlying linear regression? (1) For each value of X, there is a group of Y values that is normally distributed. (2) The means of these normal distributions of Y values all lie on the regression line. (3) The standard deviations of these normal distributions are equal.

		Only (1)
		All of these choices are correct.
		Only (3)
		Only (2)