If a control group has 20 participants and an experimental group also has 20 participants, then the degrees of freedom for tind on the two groups are.
A)40
B)38
C)20
D)19

Question

Quizplus · Accepted Answer

The degrees of freedom for an independent samples t-test (tind) are calculated as the sum of the number of participants in both groups minus 2. Therefore, with 20 participants in each group, the degrees of freedom are (20 + 20) - 2 = 38.

If a Control Group Has 20 Participants and an Experimental