For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment, which of the following identifies the correct df for the F?ratio?
A)1, 18
B)1, 19
C)2, 18
D)2, 19

Question

Quizplus · Accepted Answer

In an independent-measures experiment with two treatment conditions and n = 10 in each, the degrees of freedom for the F-ratio are calculated as df between = k - 1 and df within = N - k, where k is the number of groups and N is the total number of observations. Here, k = 2 and N = 20, so df between = 1 and df within = 18.

For an Independent-Measures Experiment Comparing Two Treatment Conditions with a Sample