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.
Mean accuracy and mean confidence rating of the Confidence Rating group in practice. Left - confidence rating (gray) and accuracy (blue). Right - confidence rating in Valid (green), Neutral (yellow) and Invalid (red) conditions. Standard error is shown by a ribbon.
