Skip to Search Skip to Left Navigation U.S. Department of Transportation (US DOT) Research and Innovative Technology Administration (RITA) Bureau of Transportation Statistics (BTS)Bureau of Transportation Statistics (BTS) - Research and Innovative Technology Administration (RITA) - United States Department of Transportation (USDOT, US DOT or DOT)
  ABOUT RITA | CONTACT US | PRESS ROOM | CAREERS | SITE MAP
Bureau of Transportation Statistics
Data and Statistics
Bookstore
Programs
About BTS
Upcoming Press Releases
External Links
Intelligent Transportation Systems
National Transportation Library
Research, Development and Technology
Transportation Safety Institute
University Transportation Centers
Volpe National Transportation Systems Center
Printable Version

Table 2
Descriptive Statistics: Dependent Variables

Excel | CSV

Variable   Mean Standard deviation
Ttlge60 overall 1195.32 2527.11
Ttlge60 across-counties   2532.24
Ttlge60 across-years   280.26
Fatge60 overall 10.61 19.28
Fatge60 across-counties   19.12
Fatge60 across-years   3.48
Injrge60 overall 526.19 1257.33
Injrge60 across-counties   1261.96
Injrge60 across-years   119.57
Pdoge60 overall 658.52 1273.48
Pdoge60 across-counties   1269.68
Pdoge60 across-years   189.60
Ttllt60 overall 7492.10 17902.68
Ttllt60 across-counties   17949.75
Ttllt60 across-years   1887.81
Fatlt60 overall 60.70 122.32
Fatlt60 across-counties   120.56
Fatlt60 across-years   25.77
Injrlt60 overall 3103.00 7890.45
Injrlt60 across-counties   7885.63
Injrlt60 across-years   1043.86
Pdolt60 overall 4328.40 9988.92
Pdolt60 across-counties   10016.22
Pdolt60 across-years   1043.56

Key: Overall standard deviation: calculated across all groups and time periods. Across-counties standard deviation: obtained by first calculating the 18-year average for each county and then calculating the standard deviation across counties. Across-years standard deviation: obtained by first calculating, for each year, the average over all counties and then calculating the standard deviation for the 18-year period.