2.14 [EX02-014] The Office of Aviation Enforcement and Proceedings, U.S. Department of Transportation, posted this table listing the number of consumer complaints against top U.S. airlines by complaint category.

Complaint Category Number Complaint Category Number Advertising 68 Flight problems 2031 Baggage 1421 Oversales 454 Customer service 1715 Refunds 1106 Disability 477 Reservations/ticketing/boarding 1159 Fares 523 Other 322 Source: Office of Aviation Enforcement and Proceedings, U.S. Department of Transportation, Air Travel Consumer Report, http://www.infoplease.com/

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a. Construct a Pareto diagram depicting this information.

b. What complaints would you recommend the airlines pay the most attention to correcting if they want to have the most effect on the overall number of complaints? Explain how the Pareto diagram from part a demonstrates the validity of your answer.