Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 5 - Section 5.6 - The Poisson Probability Distribution - Exercises - Page 213: 5.59

Answer

a. λ=100*0.2 = 20 P P(x=25) =$\frac{20^{25}e^{-20}}{25!}$=0.04459 b. i. $P(x\leq8)$ = 0.0021 ii. $P(15\leq x \leq 20)$ = $P(x\leq20)$- $P(x\leq14)$ = 0.5591-0.1049=0.4542 iii.$P(x\geq30)$ = 1-$P(x\leq29)$ = 0.0218
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