The t Test An effect size of .60 means that the independent variable in our experiment accounted for approximately ___ of the variance in the dependent variable.
A)30%
B)36%
C)60%
D)90%

Question

Quizplus · Accepted Answer

An effect size of .60 in the context of a t-test (Cohen's d) does not directly translate to the percentage of variance explained in the dependent variable. However, to approximate the variance explained (R^2) from Cohen's d, we can use the formula R^2 = d^2 / (d^2 + 4). Plugging in .60 for d gives R^2 = .60^2 / (.60^2 + 4) = .36 or 36%, indicating that approximately 36% of the variance in the dependent variable is accounted for by the independent variable.

The T Test an Effect Size of