Which of the following statistics would be considered an effect size for use in meta-analyses?
A) an odds-ratio
B) the p-value for a study
C) the standardized mean difference between two experimental groups
D) A and B
E) A and C
F) all of the above

Question

Quizplus · Accepted Answer

An odds-ratio and standardized mean difference are both commonly used effect sizes in meta-analyses. P-values alone do not provide information on effect size, as they only indicate the statistical significance of a result. Therefore, the best choice is E, which includes both an odds-ratio and standardized mean difference.

Which of the Following Statistics Would Be Considered an Effect