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.
A linear regression (solid line; R2 = 0.79, p = 0.0013) is shown, as well as maximum (orange dashed line; y = 14.1x + 15.4) and minimum (green dashed line; y = 4.1x) bounds to the data envelope.
