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.
Bold curves illustrate the mean values. A likelihood value of 0.5 corresponds to chance. Note the different abscissae scale orientations.
