Most air travelers now use e-tickets. Electronic ticketing allows passengers to not worry about a paper ticket, and it costs the airline companies less to handle than paper ticketing. However, in recent times the airlines have received complaints from passengers regarding their e-tickets, particularly when connecting flights and a change of airlines were involved. To investigate the problem, an independent watchdog agency contacted a random sample of 20 airports and collected information on the number of complaints the airport had with e-tickets for the month of March. The information is reported below.
At the .05 significance level, can the watchdog agency conclude the
- a. What assumption is necessary before conducting a test of hypothesis?
- b. Plot the number of complaints per airport in a frequency distribution or a dot plot. Is it reasonable to conclude that the population follows a
normal distribution ? - c. Conduct a test of hypothesis and interpret the results.
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Statistical Techniques in Business and Economics
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