A report on airline quality included the accompanying data on the on-time arrival percentage and the number of complaints files per 100,000 passengers for U.S. airlines. Airline On-Time Arrival Percentage Complaints per 100,000 Passengers Alaska 86 0.44 American 80 2.10 Delta 86 0.70 Envoy Air 74 1.57 Express Jet 78 1.03 Frontier 73 3.89 Hawaiian 88 0.91 JetBlue 76 1.19 SkyWest 80 0.86 Southwest 80 0.55 Spirit 68 Not reported United 78 2.73 Virgin America 79 Not reported The report did not include data on the number of complaints for two of the airlines. Use the given data from the other airlines to fit the least squares regression line. (Round your answers to four decimal places.) ŷ = + ( ) x Use the least squares regression line to predict the number of complaints per 100,000 passengers for Spirit and for Virgin America. (Round your answers to two decimal places.) Spirit ( ) complaints per 100,000 Virgin America ( ) complaints per 100,000
Added by Thomas E.
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We will exclude Spirit and Virgin America since their complaint data is not reported. x = [86, 80, 86, 74, 78, 73, 88, 76, 80, 78] y = [0.44, 2.10, 0.70, 1.57, 1.03, 3.89, 0.91, 1.19, 0.86, 2.73] Show more…
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In recent years, airline passengers have expressed much more dissatisfaction with airline service than ever before. Complaints include flight delays, lost baggage, long runway delays with little or no onboard service, overbooked flights, cramped space due to fuller flights, canceled flights, and grumpy airline employees. A majority of dissatisfied fliers merely grin and bear it. In fact, in the mid-1990s, the average number of complaints per 100,000 passengers boarded was only 0.66. For several years, the average number of complaints increased to 0.74, 0.86, 1.08, and 1.21. There seems to be a downward trend now. In 2018, according to the Department of Transportation, the industrywide figure was an average of 0.88 complaints per 100,000 passengers. Of the top six U.S. airlines in system-wide enplanements, Southwest Airlines had the fewest average number of complaints per 100,000 with 0.27, followed by Delta Air Lines with 0.39. Of all U.S. airlines, Frontier Airlines had the highest average number of complaints per 100,000 with 4.37 followed by Spirit Airlines with 2.46. Because these average numbers of complaints per 100,000 are relatively small and occur randomly, such complaints may follow a Poisson distribution. In such a case, λ represents the average number of complaints; and the interval is 100,000 passengers. Things to Ponder Based on the figures given in this feature, can you reach any conclusions about the rate of passenger complaints in general? Passenger complaints appear to be rare occurrences. Can you suggest some reasons why this is the case?
Patha S.
Suppose an article included the accompanying data on airline quality score and a ranking based on the number of passenger complaints per 100,000 passengers boarded. In the complaint ranking, a rank of 1 is best, corresponding to fewest complaints. Similarly, for the quality score, lower scores correspond to higher quality. Airline | Passenger Complaint Rank | Airline Quality Score Airtran | 6 | 3 Alaska | 2 | 4 American | 8 | 8 Continental | 7 | 5 Delta | 12 | 7 Frontier | 5 | 6 Hawaiian | 3 | Not rated JetBlue | 4 | 1 Northwest | 9 | Not rated Southwest | 1 | 2 United | 11 | 9 US Airways | 10 | 10 Two of the airlines did not have an airline quality score. Use the ranks for the other 10 airlines to fit a least-squares regression line. (Let x = passenger complaint rank and y = airline quality score. Round your values to three decimal places.) y = [ ] + ([ ])x
James K.
Suppose an article included the accompanying data on airline quality score and a ranking based on the number of passenger complaints per 100,000 passengers boarded. In the complaint ranking, a rank of 1 is best, corresponding to fewest complaints. Similarly, for the quality score, lower scores correspond to higher quality. Airline Passenger Complaint Rank Airline Quality Score Airtran 6 4 Alaska 2 3 American 8 7 Continental 7 5 Delta 12 8 Frontier 5 6 Hawaiian 3 Not rated JetBlue 4 1 Northwest 9 Not rated Southwest 1 2 United 11 9 US Airways 10 10 Two of the airlines did not have an airline quality score. Use the ranks for the other 10 airlines to fit a least-squares regression line. (Let x = passenger complaint rank and y = airline quality score. Round your values to three decimal places.) ŷ = _ + _ x
Evelyn C.
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