Question

The ages of a sample of eight commercial planes which an airline uses at O'Hare Field are: 15, 18, 22, 3, 15, 21, 12, 14 What is the Interquartile range? (6 points) 13. 14 If one of the planes from the sample is selected at random, what age will be less than the mode? (6 points) the probability that its 5 15. The shift changes after 5 more of these planes listed depart. How many different departure orderings are possible among these planes before the shift changes? (7 points) The average cost to service a plane yearly is equal to $5,000*T $60,000, where T is the 16. the plane. What is the average cost per year to service a plane in this fleet? (6 age points)

13-16. Show all work on problems that involve calculation, including the formulae used and calculation step by step

Answer 1

Ho 10) 4 4 1 5 45 18 21 2 2 31 2 3.) IGR = d quanh le- 1 st quantile data has to Le 3onted in incaeaing cnder and +3d o fh thols +7 2 18+21 12+14 653.25 19.5-13 2 it came twice in the san hle ane les than mode 3/8 4) Mode =15 as 3, 42, 44 Prebablity- Chuare 5 hlanes brom 8 in -56 () (ays 15) .Poille We eam deuns On a hlane 3+12+14 151518+ 2 1 + 2 2 16) Avo age 45 AVg Cast (50oo #15) + 60, 000 = $ 135,000 2