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# Most air travellers now use e-tickets. Electronic ticketingallows passengers to not worry about a paper ticket, and it coststhe airline companies less to handle tha...

## Question

###### Most air travellers now use e-tickets. Electronic ticketingallows passengers to not worry about a paper ticket, and it coststhe airline companies less to handle than paper ticketing. However,in recent times, the airlines have received complaints frompassengers regarding their e-tickets, particularly when connectingflights and a change of airlines were involved. To investigate theproblem, an independent agency contacted a random sample of 20airports and collected information on the number of comp

Most air travellers 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 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: 13 11 10 14 12 18 16 16 10 11 16 17 10 17 18 17 12 11 13 18 At the 0.01 significance level, can the agency conclude that the mean number of complaints per airport is less than 16 per month? a. What assumption is necessary before conducting a test of hypothesis? (Click to select) The population of complaints follows a normal probability distribution. The population of complaints not follows a normal probability distribution. The population of complaints follows a uniform probability distribution. b. Not available in Connect. c. Conduct a test of hypothesis and interpret the results. H0 : Î¼ â‰¥ 16; H1 : Î¼ < 16; (Click to select) Accept Reject H0 if t < . (Round the final answer to 3 decimal places.) The value of the test statistic is . (Negative answer should be indicated by a minus sign. Round the final answer to 2 decimal places.) (Click to select) Reject Do not reject H0. There is (Click to select) enough not enough evidence to conclude that the mean number of complaints is less than 16.

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