For an independent-measures research study, the data show an 8-point difference between the two treatment means and a pooled variance of 4.Given this information, what is the value of Cohen's d?
A)8/4
B)8/2
C)4/8
D)Cannot answer without knowing the sample sizes.

Question

Quizplus · Accepted Answer

Cohen's d is calculated as the difference between the two means divided by the standard deviation. The standard deviation is the square root of the pooled variance, which is √4 = 2. Therefore, Cohen's d = 8/2 = 4.

For an Independent-Measures Research Study, the Data Show an 8-Point