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.
| Model | Site Class | 0 | 1 | 2a | 2b |
| Model A (Null) | proportion | 0.955 | 0.016 | 0.029 | <10−3 |
Background 
|
0.010 | 1.000 | 0.010 | 1.000 | |
foreground 
|
0.010 | 1.000 | 1.000 | 1.000 | |
| Model A (Alternative) | proportion | 0.979 | 0.016 | 0.004 | <10−3 |
background 
|
0.011 | 1.000 | 0.011 | 1.000 | |
foreground 
|
0.011 | 1.000 | 225.5 | 225.5 |
