# Posts Tagged ‘ Type I Error ’

## Power Analysis and the Probability of Errors

September 22, 2012
By
$Power Analysis and the Probability of Errors$

Power analysis is a very useful tool to estimate the statistical power from a study. It effectively allows a researcher to determine the needed sample size in order to obtained the required statistical power. Clients often ask (and rightfully so) what the sample size should be for a proposed project. Sample sizes end up being