Skip to main content
U.S. flag

An official website of the United States government

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.


Information Technology Laboratory (ITL)

Statistical Engineering Division (SED)

Boulder Statistics Group (BSG)

Michael Frey, Group Leader [at] (

325 Broadway, MC898.03
Boulder, CO 80303-3328

303-497-5690 Telephone
303-497-3012 Facsimile



If you have any questions regarding this website, or notice any problems or inaccurate information, please contact the webmaster by sending e-mail to: sedwww [at]



Created September 1, 2010, Updated October 1, 2020