When performing a single-sample t test, an effect size of 0.20 would be interpreted as a _____ effect.
A) small
B) medium
C) large
D) negligible

Question

Quizplus · Accepted Answer

An effect size of 0.20 would be interpreted as a small effect according to conventional benchmarks for effect size interpretation. Cohen's d is widely used as a measure of effect size for t-tests, and values of 0.2, 0.5, and 0.8 are often used as cutoffs for small, medium, and large effects, respectively. Therefore, a value of 0.2 falls into the small effect range.

When Performing a Single-Sample T Test, an Effect Size of 0.20