An independent-measures study uses n = 15 participants in each group to compare two treatment conditions.What is the df value for the t statistic for this study?
A)14
B)15
C)28
D)29

Question

Quizplus · Accepted Answer

The degrees of freedom (df) for an independent-measures t-test is calculated using the formula: df = (n1-1) + (n2-1). For this study, n = 15 for each group, so df = (15-1) + (15-1) = 28. Therefore, the correct answer is C) 28.

An Independent-Measures Study Uses N = 15 Participants in Each