The degrees of freedom associated with residual variation are equal to ______.
A) the number of predictor variables
B) the number of predictor variables minus one
C) n - 1
D) n - 2

Question

Quizplus · Accepted Answer

The degrees of freedom associated with residual variation are equal to the total number of observations minus the number of estimated coefficients. In a simple linear regression model with one predictor variable, there are two estimated coefficients (intercept and slope), so the degrees of freedom for residual variation are n - 2.

The Degrees of Freedom Associated with Residual Variation Are Equal