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.

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.

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Complaint Category Advertising Baggage Customer service Disability Complaint Number Category Number 203T 454 1106 1159 Fli ght problems Oversales Refunds Reservations/ 1715 477 icketing/boarding Other Fares 523 322