In a repeated-measures study comparing two treatments with a sample of n = 15 participants,the researcher measures two scores for each individual to obtain a total of 30 scores and the repeated-measures t statistic has df = 29.

Question

Quizplus · Accepted Answer

In a repeated-measures study, the degrees of freedom (df) for the t statistic are calculated based on the number of participants, not the total number of scores. Since each participant is measured twice, the df would be n - 1, which is 15 - 1 = 14, not 29.

In a Repeated-Measures Study Comparing Two Treatments with a Sample