A repeated-measures study uses a sample of n = 20 participants to evaluate the mean
differences among three treatment conditions. In the analysis of variance for this study, what is
the value for dfbetween treatments?
To determine the value for dfbetween treatments in the analysis of variance (ANOVA) for a repeated-measures study, we need to have specific information about the design of the study. The value for dfbetween treatments depends on the number of treatment conditions and the number of participants in the study.
In this case, the study uses a sample of n = 20 participants to evaluate the mean differences among three treatment conditions. For a repeated-measures design, each participant is measured under all three treatment conditions.
To calculate the value for dfbetween treatments in this scenario, we subtract 1 from the total number of treatment conditions. In this case, there are three treatment conditions, so the value for dfbetween treatments would be 3 - 1 = 2.
Therefore, the value for dfbetween treatments in the analysis of variance for this study is 2.