Answer 1 and 3 only

Problem 2. (50 p.) One of the Airline XYZ Ltd.s top competitive priorities is on-time arrivals. Quality VP decided to personally monitor the companys performance in this area. Each week for the past 30 weeks, she checked a random sample of 100 flight arrivals for on-time performance. The table below contains the number of flights that did not meet the Airline XYZs definition on time.

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

Q1. (20 p.) Determine the upper and lower control limits for a relevant control chart.

Q2. (10 p.) Is the process in control? Justify your answer.

Q3. (20 p.) Assume that the airline industrys upper and lower control limits for flights that are not on time are 0.1000 and 0.0000, respectively. Assume also that the industrys standard deviation of the percentage of late flights is 0.01. What can the VP report about the quality of her company performance in regards to on-time arrivals?

Answer 1 and 3 only