Figure 3.
The distributions of 
-split scores for 
are shown. Scores were computed for all 
possible splits for a data set of 500 bp generated under the Jukes–Cantor model on the tree in Figure 1 with all branch lengths set to 
. These distributions are left-tailed, and the mean increases and the standard deviation (SD) decreases as 
increases. Behavior for other values of 
is similar. The red dots show the scores for the true 
-splits in the tree, which are the smallest in the data. (There are no 
-splits in the tree.) The blue line segment marks the mean. The 
-axis is the same on all subplots, but the 
-axis scales differ vastly because 
increases as 
varies from 
to 
. (See online for color.)