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 median value is represented by the horizontal line within each box, the box is the interquartile range and the whiskers extend to 1.5 times the interquartile range. Circles represent outliers and the diamond represents the mean value
