Suppose an experiment had a total of 45 participants who were randomly assigned to one of three groups with 15 participants in each group. The df for the SSError would equal .
A)45
B)42
C)15
D)3

Question

Quizplus · Accepted Answer

The degrees of freedom for the SSError (error or within-groups variance) in an ANOVA is calculated as the total number of observations minus the number of groups. Here, with 45 participants and 3 groups, the df = 45 - 3 = 42.

Suppose an Experiment Had a Total of 45 Participants Who