A researcher reports that the size of an effect in Population A is d = 0.10 and the effect size in Population B is d = 0.34.Which population is associated with greater power to detect an effect?
A) Population A
B) Population B
C) They are associated with the same level of power.

Question

Quizplus · Accepted Answer

The effect size in Population B is larger than the effect size in Population A, which means that Population B is associated with greater power to detect an effect. Larger effect sizes are generally easier to detect and require smaller sample sizes to achieve a given level of power.

A Researcher Reports That the Size of an Effect in Population