A professor computes the mean difference in exam scores before and after a lecture as 9.0±14.5 ( ),and this difference was significant.What is the effect size for this result using estimated Cohen's d?
A)d = 0.62 (medium effect)
B)d = 1.61 (medium effect)
C)d = 0.62 (large effect)
D)d = 1.61 (large effect)

Question

A professor computes the mean difference in exam scores before and after a lecture as 9.0±14.5 (  ),and this difference was significant.What is the effect size for this result using estimated Cohen's d?
A)d = 0.62 (medium effect) 
B)d = 1.61 (medium effect) 
C)d = 0.62 (large effect) 
D)d = 1.61 (large effect)

Quizplus · Accepted Answer

The Answer of A professor computes the mean difference in exam scores before and after a lecture as 9.0±14.5 (  ),and this difference was significant.What is the effect size for this result using estimated Cohen's d?
A)d = 0.62 (medium effect) 
B)d = 1.61 (medium effect) 
C)d = 0.62 (large effect) 
D)d = 1.61 (large effect)

A Professor Computes the Mean Difference in Exam Scores Before