> For a wide range of common statistical tests, transitioning from a P value threshold of α = 0.05 to α = 0.005 while maintaining 80% power would require an i

> For a wide range of common statistical tests, transitioning from a P value threshold of α = 0.05 to α = 0.005 while maintaining 80% power would require an increase in sample sizes of about 70%. This seems unintuitive and the claim is unreferenced. Can anyone explain why this is the case (if true)?