The effect size computed for the t test is equivalent to ____________.
A) the Pearson r
B) the phi coefficient
C) the Spearman rho
D) the point-biserial correlation

Question

Quizplus · Accepted Answer

The point-biserial correlation is the appropriate effect size measure for a t-test, as it measures the relationship between a continuous variable (the t-test) and a dichotomous variable (the group membership). The Pearson r, phi coefficient, and Spearman rho are all correlation measures, but they are not appropriate for a t-test, which is a test of differences between two groups.

The Effect Size Computed for the T Test Is Equivalent