USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

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.

Site Notification

Site Notification

 Find the latest Coronavirus-related transportation statistics on the BTS COVID-19 landing page.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Appendix A - Tables with Estimates Used in the Report and Standard Errors

Wednesday, December 21, 2011

Appendix A - Tables with Estimates Used in the Report and Standard Errors

The following tables show the estimates and their accompanying standard errors. Standard errors (SE) are in the same metric as the estimates. All comparisons in the text are statistically significant at a 0.05 level unless otherwise noted.