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 line in box plots represents the median, the box represents interquartile range and the whiskers correspond to minimum and maximum values. P-values are from Steel-Dwass test
