For a repeated-measures study comparing two treatments with a sample of n = 9 participants,the difference scores have a mean of MD = 4.90 with SS = 72.What is the estimated standard error for the sample mean difference?
A)9
B)3
C)1
D)√8/3

Question

Quizplus · Accepted Answer

The estimated standard error for the sample mean difference is calculated using the formula: SE = sqrt(SS / (n(n-1))). Plugging in the values: SE = sqrt(72 / (9(9-1))) = sqrt(72 / 72) = sqrt(1) = 1.

For a Repeated-Measures Study Comparing Two Treatments with a Sample