Given M = 26, n = 9, μ = 23, and s = 6.2, Cohens's d is _______, which is considered to be a ______________ effect.
A) .48; small
B) .48; moderate
C) 1.44; large
D) 1.44; extra large

Question

Quizplus · Accepted Answer

Cohen's d = (μ - M) / s
Cohen's d = (23 - 26) / 6.2 = -0.48
Since the absolute value of Cohen's d is between 0.2 and 0.5, it is considered to be a small effect size. Therefore, the answer is option A.

Given M = 26, N = 9, μ = 23