SOLUTION: The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best reate with 80 % of its fli

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Question 1179029: The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best reate with 80 % of its flights arriving on time. A test is conducted by randomly selecting 13 Southwest flights and observing whether they arrive on time.
(a) Find the probability that exactly 5 flights arrive on time.
Found 2 solutions by ewatrrr, ikleyn:
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
Binomial distribution: p = .80
n = 13 flights
 P(x = 5 on time)
Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus
 P(x = 5) = binompdf( 13,.8,5) = .0011  0r .11%

Wish You the Best in your Studies.

Answer by ikleyn(52810)   (Show Source): You can put this solution on YOUR website!
.

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