Table 5 Results of Intervention Analyses for the Five Series,,,,,
Time series,# obs. after 8/1/2001,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.,,,,,