A One-Way Analysis of Variance Andrew designed a between-subjects experiment with one independent variable with three levels.There are 20 subjects in each condition.There are ____ degrees of freedom for within-groups variability.
A)1
B)3
C)17
D)57

Question

Quizplus · Accepted Answer

The degrees of freedom for within-groups variability in an ANOVA is calculated as N - k, where N is the total number of observations and k is the number of groups. With 20 subjects in each of 3 conditions, N = 60 (20*3), and k = 3. Therefore, the degrees of freedom for within-groups variability is 60 - 3 = 57.

A One-Way Analysis of Variance Andrew Designed a Between-Subjects Experiment