Which of the following sets of data would produce the largest value for Cohen's d?
A)n = 10 for both samples, a pooled variance of 15, and a mean difference of 3 points
B)n = 20 for both samples, a pooled variance of 15, and a mean difference of 5 points
C)n = 10 for both samples, a pooled variance of 20, and a mean difference of 3 points
D)n = 20 for both samples, a pooled variance of 20, and a mead difference of 5 points

Question

Quizplus · Accepted Answer

Cohen's d is calculated as the difference between two means divided by the pooled standard deviation. The larger the mean difference and the smaller the pooled variance, the larger the Cohen's d value. Option B has the largest mean difference with a moderate pooled variance, leading to the largest Cohen's d value.

Which of the Following Sets of Data Would Produce the Largest