For a linear regression calculated for a sample of n = 20 pairs of X and Y values,what is the value for degrees of freedom for the unpredicted portion of the Y-score variance,MS_residual? A)1 B)2 C)18 D)19

Question

Quizplus · Accepted Answer

The degrees of freedom for the unpredicted portion of the Y-score variance in linear regression is equal to the sample size minus the number of estimated regression coefficients (including the intercept), which is n - p. In this case, p = 2 (one for the intercept and one for the slope), so the degrees of freedom for the unpredicted portion of the Y-score variance is 20 - 2 = 18. Therefore, the correct answer is C.

For a Linear Regression Calculated for a Sample of N