In a multiple regression analysis involving k independent variables and n data points,the number of degrees of freedom associated with the sum of squares for error is:
A)k− 1
B)n−k
C)n− 1
D)n−k− 1

Question

Quizplus · Accepted Answer

The number of degrees of freedom associated with the sum of squares for error in a multiple regression analysis is calculated as n - k - 1, where n is the number of data points and k is the number of independent variables. This accounts for the estimation of k parameters (the coefficients for each independent variable) and the intercept, leaving n - k - 1 degrees of freedom for error.

In a Multiple Regression Analysis Involving K Independent Variables and N