Looking at four different diets,a researcher randomly assigned 20 equally overweight women into each of the four diets.What are the degrees of freedom for the error?
A)20
B)4
C)3
D)19
E)16

Question

Quizplus · Accepted Answer

The degrees of freedom for the error in an ANOVA test is calculated as the total number of observations minus the number of groups. Here, there are 80 observations (20 women per diet x 4 diets) and 4 groups, so the degrees of freedom for the error is 80 - 4 = 76. However, since the question asks for the degrees of freedom for each group, it would be 20 - 1 = 19 per group, but the total error degrees of freedom is 76.

Looking at Four Different Diets,a Researcher Randomly Assigned 20 Equally