3. Repeated-measures and matched-subjects experiments Aa Aa Repeated-measures ex

Question

3. Repeated-measures and matched-subjects experiments Aa Aa 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. The researcher computes difference scores to compute a t statistic. If the researcher has n number of participants to use in the experiment, then the degrees of freedom will be the same in a repeated-measures experiment or in a matched-subjects experiment. The researcher must compute an estimated standard error for the mean difference score to compute a t statistic. Participants in both types of experiments are all measured the same number of times A matched-subjects experiment produced a t statistic with a df of 9. How many subjects participated in this study? O 20 O 10 O 18 For a repeated-measures experiment comparing two treatment conditions, the t statistic has a df of 11. How many subjects participated in this study? O 12 O 22 O 24 O 11

Explanation / Answer

Solution:-

1) option D.

=> Repeated measures : test or measure the same participants in both treatment conditions of experiment.

2) option C. 10

=> df = 9 , df = n-1 = 9 = 10 - 1

3) option A . 12

=> df = n-1 = 12-1 = 11

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