Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The impact of noninformative subjects on study power. If noninformative data are not excluded, then a study intended to be powered at 90% would have an actual power between 50% and 87% depending on the percentage of subjects (10%–40%) contributing noninformative data. A study intended to be powered at 80% would have an actual power between 39% and 72%.
