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.
Results for example data using frequency and footprint statistics. Display showing data from Figure 1 with overlay of the confidences, indicated by gray bars. The red line graphs the actual frequencies in the sample set. (A) Frequency only. (B) Footprint only.
