A measure of the size of an effect in a population is called
A) significance.
B) probability.
C) power.
D) effect size.

Question

Quizplus · Accepted Answer

Effect size measures the magnitude of a phenomenon or the extent of the relationship between two variables in a population. It is different from significance, which simply determines the likelihood of an observed effect occurring by chance, and from probability, which describes the chance of a certain event happening. Power refers to the ability of a statistical test to detect a true effect, but it does not provide information about the size of the effect. Therefore, the best answer is D - effect size.

A Measure of the Size of an Effect in a Population