In a correlated-groups design,if n = 20,then df =
A)20.
B)19.
C)21.
D)40.

Name: In a correlated-groups design,if n = 20,then df = A)20. B)19. C)21. D)40.
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Quizplus · Accepted Answer

In a correlated-groups design, the same subjects are used in each group, which creates a dependency between the groups. Therefore, we use a dependent t-test to analyze the data, which has (n-1) degrees of freedom. In this case, since we have 20 subjects, the degrees of freedom would be (20-1) = 19. Therefore, the correct answer is B.

In a Correlated-Groups Design,if N = 20,then Df =