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) A skewed observed distribution (thick line) resulting from a population mixture distribution (dashed lines) consisting of three classes with equal variance. (b) The same skewed observed distribution can be due to a mixture with two components that have unequal variance.
