Once you have the significance value of the t-test, it is beneficial to calculate the effect size. Cohen's d is a measure of effect size. How is it calculated?
A) (mean 2 - mean 1) / mean of the standard deviation
B) (mean 2 - mean 1) × mean of the standard deviation
C) (mean 2 + mean 1) - mean of the standard deviation
D) (mean 2 / mean 1) + mean of the standard deviation

Question

Quizplus · Accepted Answer

Cohen's d is calculated as the difference between the means of two groups divided by the pooled standard deviation. The formula for Cohen's d is (mean 2 - mean 1) / mean of the standard deviation.

Once You Have the Significance Value of the T-Test, It