When statisticians talk about effect size, they are referring to
A) the probability of a Type II error
B) whether the significance level was large or small
C) whether the a level was large or small
D) the size of the differences among the means of the populations the samples are from.

Question

Quizplus · Accepted Answer

Effect size refers to the magnitude of the difference between groups or the strength of a relationship between variables, not to error probabilities or significance levels. It helps in understanding the practical significance of research findings.

When Statisticians Talk About Effect Size, They Are Referring to