Airline mergers cause many problems for the airline industry. One variable often quoted as a measure of an airline's efficiency is the percentage of on-time departures. Following the merger of Republic Airlines with Northwest Airlines, the percentage of on-time departures for Northwest planes declined from approximately 85% to about 68%. Suppose that the percentages reported above are based on two random samples of flights: a sample of 100 flights over a period of two months before the merger, of which 85 are found to have departed on time; and a sample of 100 flights over a period of two months after the merger, 68 of which are found to have departed on time. Based on these data, do you believe that Northwest's on-time percentage declined during the period following its merger with Republic?
Answer to relevant QuestionsRecent advances in cell phone screen quality have enabled the showing of movies and commercials on cell phone screens. But according to the New York Times, advertising is not as successful as movie viewing. Suppose the ...Federal Reserve Board regulations permit banks to offer their clients commercial paper. A random sample of 650 customers of Bank of America reveals that 48 own commercial paper as part of their investment portfolios with the ...Compaq Computer Corporation has an assembly plant in Houston, where the company's Deskpro computer is built. Engineers at the plant are considering a new production facility and are interested in going online with the new ...In problem 8-48, construct a 99% confidence interval for the difference between the average cost of repairing a broken leg and the average cost of repairing an injured knee. Interpret your results. In problem According to ...Two 12-meter boats, the K boat and the L boat, are tested as possible contenders in the America's Cup races. The following data represent the time, in minutes, to complete a particular track in independent random trials of ...
Post your question