Bureau of Transportation Statistics (BTS)
BTS Home > Publications > Journal of Transportation and Statistics > Volume 7 Number 1 > Paper 5
Printable Version

Table 5: Results of Intervention Analyses for the Five Series

Excel | CSV

Time series # obs. after 8/2001 AO (Sept.) TC (Oct.) LS (Nov.) Rs-squared
Late arrivals 6 14.28 -3.11 -5.52 0.404
(0.0000) (0.3334) (0.0431)  
14 13.91 -4.64 -4.94 0.402
(0.0000) (0.1264) (0.0648)  
Cancellations 6 18.12 -0.06 -1.56 0.947
(0.0000) (0.8978) (0.0001)  
14 18.00 0.72 -1.80 0.947
(0.0000) (0.2450) (0.0009)  
Enplanements 4 -17.42 -11.99 -2.25 0.813
(0.0000) (0.0000) (0.0082)  
10 -17.31 -11.18 -2.75 0.798
(0.0000) (0.0000) (0.0017)  
Air revenue passenger-miles 4 -13.94 -10.02 -1.60 0.800
(0.0000) (0.0000) (0.0245)  
10 -13.82 -9.33 -2.08 0.787
(0.0000) (0.0000) (0.0036)  
Rail revenue passenger-miles 4 -9.97 -0.18 3.38 0.564
(0.0002) (0.9460) (0.1335)  
11 -9.71 1.71 1.46 0.554
(0.0002) (0.4480) (0.3801)  

Note: The first two rows for each series provide the estimated coefficients and their p-values based on the first analysis; the next two rows provide the same information for the second analysis.
Research and Innovative Technology Administration (RITA) • U.S. Department of Transportation (US DOT)
1200 New Jersey Avenue, SE • Washington, DC 20590 • 800-853-1351 • E-mail RITA

Accessibility | Disclaimer | Fast Lane | FedStats | Freedom of Information Act | No FEAR Act | OIG Hotline | Privacy Policy | RSS | USA.gov | White House | Wireless

Plug-ins: PDF Reader | Flash Player | Excel Viewer | PowerPoint Viewer | Word Viewer | WinZip

RITA's privacy policies and procedures do not necessarily apply to external web sites. We suggest contacting these sites directly for information on their data collection and distribution policies.