What are the degrees of freedom used to test the significance of the slope in a regression equation?
A) n - 1
B) n - 2
C) n - 1, n - 2
D) (n - 1)(n - 2)

Question

Quizplus · Accepted Answer

The degrees of freedom used to test the significance of the slope in a regression equation is n-2 where n is the sample size. This is because we lose 1 degree of freedom for estimating the slope and 1 degree of freedom for estimating the intercept, leaving n-2 degrees of freedom for error. Thus, the correct answer is (B) n-2.

What Are the Degrees of Freedom Used to Test the Significance