1.28 Happy in the Air? The following table reveals complaints against Air Canada and major U.S. airlines in a given year."

a. Construct a pie chart to describe the grand total number of complaints by airline.

b. Order the airlines from the smallest to the largest number of complaints. Construct a Pareto chart to describe the data. Which display is more effective?

c. Is there another variable that you could measure that might help to explain why some airlines have many more complaints than others? Explain.

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June Dec. Canada U.S. Grand Passengers Airline 2003 2003 Total Total Total (millions) Air Canada 310 176 485 36 522 20.1 Airtran Airways 0 0 0 97 97 11.7 American West Airlines 0 0 0 168 168 20.1 American Airlines 055 781 786 88.8 Continental Airlines 0 0 0 371 371 38.9 Delta 4 3 7 656 663 84.3 Northwest Airlines 1 4 5 492 497 52.0 Southwest Airlines 0 00 106 106 74.8 United Airlines 6 2 8 548 556 66.2 U.S. Airways 1 5 6 373 379 41.3