Because of safety considerations, in May 2003, the Federal Aviation Administration (FAA) changed its guidelines for how small commuter airlines must estimate passenger weights. Under the old rule, airlines used 180 pounds as a typical passenger weight (including carry-on luggage) in warm months and 185 pounds as a typical weight in cold months. The Alaska Journal of Commerce (May 25, 2003) reported that Frontier Airlines conducted a study to estimate
A) Construct a 95% confidence interval (in pounds) for the population mean summer weight (including carry-on luggage) of Frontier Airlines passengers. (Round your answers to three decimal places.)
B)Construct a 95% confidence interval (in pounds) for the population mean winter weight (including carry-on luggage) of Frontier Airlines passengers. (Round your answers to three decimal places.)
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