For a repeated-measures study comparing two treatment conditions,a researcher obtains Cohen's d = 0.50 for a sample of n = 4 scores with a variance of s² = 16.What is the value of the sample mean?
A)MD = 2
B)MD = 4
C)MD = 8
D)MD = 16

Question

Quizplus · Accepted Answer

Cohen's d is calculated as the mean difference (MD) divided by the standard deviation (s). Given Cohen's d = 0.50 and the variance s² = 16 (thus, s = 4), we can solve for MD: MD = d * s = 0.50 * 4 = 2.

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