A repeated measures analysis of variance shows F4 20 1456 Ho

A repeated measures analysis of variance shows, F(4, 20)= 14.56. How many repeated measures were there? How many subjects?

Solution

As

df1 = k - 1

where k = the number of repeated measures, then

k = df1 + 1 = 4 + 1 = 5 [ANSWER, 5 repeated measures]

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As

df2 = (k-1)(n-1)

where n = the number of subjects, then

20 = (5-1)(n-1)

20 = 4(n-1)

5 = n-1

n = 6 subjects [ANSWER]