Appendix 4

Flight Delay Statistics (Prepared by Flight Operations)

Sample Number	Delayed Flights	Sample Number	Delayed Flights	Sample Number	Delayed Flights
1	1	11	5	21	2
2	2	12	4	22	2
3	7	13	7	23	1
4	2	14	3	24	0
5	0	15	0	25	6
6	1	16	1	26	4
7	0	17	2	27	2
8	1	18	0	28	1
9	1	19	1	29	1
10	4	20	3	30	0

Notes:

• A random sample of 50 flights was taken over a 30 day period.
• A flight more than 20 minutes late is classified as a delayed flight.
• The airline industry's lower and upper (3-sigma) control limits for delayed flights are 2% to 15%.
• The average of delayed flights for the industry is 8%.