Hypothesis test results Mean of CRSElapsedTime where DestDF

Hypothesis test results: : Mean of CRSElapsedTime where Dest-DFW 2 : Mean of CRS ElapsedTime where Dest-JFK 1-u2 : Difference between two means H0 : 1-2 = 0 (without pooled variances) Difference Sample Diff. Std. Err. DF T-Stat P-value 7.6428571 3.6786292 4.3656605 2.0776373 0.0502

Solution

(A) is the most appropriate reason. (B) is wrong because a late flight is a late flight, and there are only 2 outcomes, either late or not late. (C) is wrong because we can consider this event as \"late\" because flight did not reach on time.