For a repeated-measures study comparing two treatment conditions,a researcher obtains a sample of n = 9 difference scores with a mean of M_D = 4 and a variance of s² = 36.What is the value for the repeated-measures t statistic for these data? A)4/2 B)4/4 C)4/6 D)4/36

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Quizplus · Accepted Answer

The repeated-measures t statistic is calculated as the mean difference divided by the standard error of the mean difference. The standard error of the mean difference is calculated as the square root of the variance divided by the sample size. In this case, the mean difference is 4, the variance is 36, and the sample size is 9. Therefore, the standard error of the mean difference is sqrt(36/9) = 2. The repeated-measures t statistic is therefore 4/2 = 2.

For a Repeated-Measures Study Comparing Two Treatment Conditions,a Researcher Obtains