In the study described in Question 14, suppose an appropriate covariate has been chosen. What are the degrees of freedom for the error term?
A) 4
B) 24
C) 25
D) 29

Question

Quizplus · Accepted Answer

The degrees of freedom for the error term in an analysis of covariance (ANCOVA) are calculated by subtracting the number of parameters estimated (including the covariate) from the total number of observations. Without specific details from Question 14, a typical scenario might involve adjusting for group sizes and the inclusion of a covariate. If there were 30 observations and parameters estimated include group means, the covariate, and the overall mean, the degrees of freedom for error would be reduced accordingly. Assuming one covariate and groups are accounted for, and without exact numbers from the original question, the choice closest to a common scenario for an ANCOVA with a moderate sample size and one covariate is 24, suggesting some parameters (including groups and the covariate) have been accounted for, leaving 24 degrees of freedom for error.

In the Study Described in Question 14, Suppose an Appropriate