Figure 6.
Example values of 
versus the conservative tree balance index 
. The latter index takes account of the size of each internal node, relative to the sum of its descendant node sizes.
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.