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)8/1

Question

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)​8/1

Quizplus · Accepted Answer

Cohen's d is calculated by dividing the difference between the means (8) by the pooled standard deviation which is the square root of the pooled variance (4), which equals 2. Therefore, Cohen's d is 8/2 = 4.

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