Mathematics, 08.04.2020 03:06, chanel2013

According to the Air Transport Association of America, the average operating cost of an MD-80 jet airliner is $2,087 per hour. Suppose the operating costs of an MD-80 jet airliner are normally distributed with a standard deviation of $177 per hour. (Round the value of z to 2 decimal places. Round your answers to 2 decimal places.)

(a) At what operating cost would only 20% of the operating costs be less?

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According to the Air Transport Association of America, the average operating cost of an MD-80 jet ai...