Question 3: answer everything please

Attempts Keep the Highest / 3 3. Repeated-measures and matched-subjects experiments Repeated-measures experiments measure the same set of research participants two or more times, while matched-subjects experiments study participants who are matched on one or more characteristics. Which of the following are true for both a repeated-measures experiment and a matched-subjects experiment when used to compare two treatment conditions? Check all that apply. Participants in both types of experiments are all measured the same number of times. The researcher must compute a pooled variance to compute a t statistic. The researcher computes difference scores to compute a t statistic. They both use the same t statistic. For a repeated-measures experiment comparing two treatment conditions, the t statistic has a df of 31. How many subjects participated in this study? 62 32 31 64 A matched-subjects experiment produced a t statistic with a df of 13. How many subjects participated in this study? 13 26 14 28