Question

The population effect size is related to:

A.the probability of a Type I error.

B. how false the alternative hypothesis is.

C.how false the null hypothesis is.

Answer 1

Ans: The population effect size is related to how false the null hypothesis is

Effect size either measure the sizes of associations or the sizes of differences. In null hypothesis, we assume there is no significant difference in mean of 2 groups and by determining the p value , we decide whether to reject the null hypothesis or not. As the sample size increases, the p value goes down. The p value does tell us about the effect but not about the magnitude of effect. That magnitude or size of the effect is determined by the effect size. One such example is Cohen's d