Assume that the airline industry's 99% upper and lower control limits for the percentage of flights that
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Question:
Assume that the airline industry's 99% upper and lower control limits for the percentage of flights that are not on time are 10% and 4%, respectively. How do these compare with the MackAir's control limits in (a)? Comment.
B) What can VP Bondi report about the quality of service? Summarize in 4-5 lines
Number of late flights out of 100 randomly selected flights | ||||||
Sample (Week) | Late Flights | % Defective, p | CL | UCL | LCL | |
1 | 10 | 10% | 11% | 20% | 1% | |
2 | 12 | 12% | 11% | 20% | 1% | |
3 | 11 | 11% | 11% | 20% | 1% | |
4 | 12 | 12% | 11% | 20% | 1% | |
5 | 11 | 11% | 11% | 20% | 1% | |
6 | 8 | 8% | 11% | 20% | 1% | |
7 | 8 | 8% | 11% | 20% | 1% | |
8 | 14 | 14% | 11% | 20% | 1% | |
9 | 11 | 11% | 11% | 20% | 1% | |
10 | 13 | 13% | 11% | 20% | 1% | |
11 | 14 | 14% | 11% | 20% | 1% | |
12 | 12 | 12% | 11% | 20% | 1% | |
13 | 9 | 9% | 11% | 20% | 1% | |
14 | 9 | 9% | 11% | 20% | 1% | |
15 | 8 | 8% | 11% | 20% | 1% | |
16 | 14 | 14% | 11% | 20% | 1% | |
17 | 11 | 11% | 11% | 20% | 1% | |
18 | 9 | 9% | 11% | 20% | 1% | |
19 | 8 | 8% | 11% | 20% | 1% | |
20 | 14 | 14% | 11% | 20% | 1% | |
21 | 12 | 12% | 11% | 20% | 1% | |
22 | 8 | 8% | 11% | 20% | 1% | |
23 | 11 | 11% | 11% | 20% | 1% | |
24 | 11 | 11% | 11% | 20% | 1% | |
25 | 13 | 13% | 11% | 20% | 1% | |
26 | 10 | 10% | 11% | 20% | 1% | |
27 | 11 | 11% | 11% | 20% | 1% | |
28 | 8 | 8% | 11% | 20% | 1% | |
29 | 11 | 11% | 11% | 20% | 1% | |
30 | 9 | 9% | 11% | 20% | 1% | |
p-bar | 0.11 | 11% | ||||
σp | 0.030954 | |||||
UCL= | 0.20 | 20% | ||||
LCL= | 0.01 | 1% |
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