For a repeated-measures study,df between treatment= 3 and dfₜₒₜₐₗ = 27.This means that there were n = 7 participants in the study.

Question

Quizplus · Accepted Answer

For a repeated-measures study, df within treatment (denoted as dfₜₒₜₐₗ in the question) is calculated based on the number of participants and the number of repeated measures taken per participant. The formula for df within treatment is (n-1) * (k-1), where n is the number of participants and k is the number of repeated measures.

Given df within treatment = 27, and assuming k=4 (since repeated-measures studies often involve 4 or more repeated measures), we can solve for n:

27 = (n-1) * (4-1)
27 = (n-1) * 3
9 = n-1
n = 10

Therefore, there were n = 10 participants in the study, not n = 7. Thus, the answer is B.

For a Repeated-Measures Study,df Between Treatment= 3 and Dfₜₒₜₐₗ =