For a repeated-measures study comparing two treatment conditions,a researcher obtains a sample of n = 9 difference scores with a mean of MD = 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

Question

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. Therefore, the repeated-measures t statistic for these data is 4 / (sqrt(36/9)) = 4 / 2 = 2.

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