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.
Ratio of inferred tree length to true tree length as a function of declared error. Dashed line indicates equality of inferred and true length. (A) True error 0.0. (B) True error 10−4. (C) True error 10−3. (D) True error 10−2. (E) True error 10−1.
