Question

(1 point) Once checked in at the ticket kiosk, the amount of time it takes a airline passenger at the Calgary International Airport to clear security is a random variable that can be modeled by the Exponential distribution with a = 35.1 minutes. A statistician is randomly select n = 40 airline passengers and record how long, in minutes, it takes each to clear security once each has checked in at the ticket kiosk. (a) Complete the statement below. Enter your answer using all the decimals you can. The distribution of X ? with a mean Hg = !!! minutes and a standard deviation Oy = minutes. (b) What is the probability that the average time for this sample of n = 40 airline passengers to clear security is between 26 minutes and 48 minutes? Enter your answer using all the decimals you can. (c) 95% of the time, the mean time it takes n = 40 airline passengers to clear security after ticket kiosk check-in is at most how many minutes? Enter your answer using all the decimals you can. 18 minutes

Answer 1

solution : xn exponential (M= 35.1) 4= 35.1 o=35-1 Approxim normal lix= li= [ 3511 som op [5.5498 b) P (26 CXL 48) Z Z L = P1 -1.64 1762-32) T - 0.9393 c) Z-score for goth percentile = 1.645 Za X-4 - 1.645. = 7 - 35.1 5.5498 =) Ă = 44.22 9 421