An airline operates a call center to handle customer questionsand complaints. the airline monitors a sample of calls to helpensure that the service being offered is of high quality. Therandom samples of 100 calls each were monitored under normalconditions. The center can be thought of as being in control whenthese 10 samples were taken. The number of calls in each sample notresulting in a satisfactory resolution for the customer is asfollows:
4 5 3 2 3 3 4 6 4 7
a. What is an estimate of the proportion of calls not resultingin a satisfactory outcome for the customer when the center is incontrol?
b. Construct the upper and lower limits for a p chart for theprocess.
c. With the results in part b. what is your conclusion if asample of 100 calls has 12 calls not resulting in a satisfactoryoutcome for the customer?
