A Researcher Working in a Sports Performance Lab Was Interested

Multiple Choice

A researcher working in a sports performance lab was interested in gender and perception of pain during extreme sports and so conducted a t-test. 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) 1.712
B) 0
C) 1.7
D) -1.712