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Questions 13 – 16 refer to the following: The ages of a sample of eight commercial...

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Statistics

Questions 13 – 16 refer to the following:
The ages of a sample of eight commercial planes which anairline uses at O’Hare Field are:
15, 18, 22, 3, 15, 21, 12, 14

14. If one of the planes from the sample is selected atrandom, what is the probability that its age will be less than themode?

15. The shift changes after 5 more of these planes listeddepart. How many different departure orderings are possible amongthese planes before the shift changes?

16.The average cost to service a plane yearly is equal to$5,000*T + $60,000, where T is the age of the plane. What is theaverage cost per year to service a plane in this fleet?

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