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.
Converting to a Gaussian ellipsoid through covariance calculation makes the comparison easier, as shown on the right. In the figure, δ1 and δ2 represent 2 standard deviations of covariance and are used as vertices of the Gaussian ellipsoid.
