The greatest statistical power occurs when
A) the sample is small and heterogeneity is small.
B) the sample is small and heterogeneity is large.
C) the sample is large and heterogeneity is small.
D) the sample is large and heterogeneity is large.

Question

Quizplus · Accepted Answer

The greatest statistical power occurs when the sample size is large and the heterogeneity is small. A large sample size increases the precision of the estimate and reduces the impact of random sampling error, while low heterogeneity reduces the variability in the sample and improves the internal validity of the study. This increases the likelihood of detecting a true effect if one exists, making the statistical power of the study higher.

The Greatest Statistical Power Occurs When