A Group 1 Mean 786 Group 2 Mean 734 Standard Deviation 2 Wha

A) Group 1 Mean 78.6 Group 2 Mean 73.4 Standard Deviation 2 What is the effect size?

B) Group 1 Mean 78.6 Group 2Mean 73.4 Standard Deviation 4 What is the effect size?

C) Group 1 Mean 78.6 Group 2 Mean 73.4 Standard Deviation 8 What is the effect size?

Please Show All Work!!

Solution

A .

Effect size = (Group 1 mean - Group 2 mean ) / ( Standard Deviation) = (78.6 - 73.4) / 2 = 2.6

B.

Effect size = (Group 1 mean - Group 2 mean ) / ( Standard Deviation) = (78.6 - 73.4) / 4 = 1.3

c .

Effect size = (Group 1 mean - Group 2 mean ) / ( Standard Deviation) = (78.6 - 73.4) / 8 = 0.65

Since the effect size and variability are inversely related, as the variable increases the effect size decreases.