A researcher was interested in comparing maths scores by gender and used a t-test to do so.The mean for males was 66.25 and the mean for females was 78.24,with both groups having a standard deviation of 7.What is the effect size using Cohen's d?
A)1.7
B)0
C)1.712
D)-1.712

Question

Quizplus · Accepted Answer

Cohen's d is calculated as the difference between two means divided by the standard deviation. Here, it's (78.24 - 66.25) / 7 = 1.712.

A Researcher Was Interested in Comparing Maths Scores by Gender