Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 6 - Section 6.3 - Assess Your Understanding - Applying the Concepts - Page 351: 13b

Answer

$P(x\lt2)=0.558$ In about 558 of every 1000 5-gram sample, there will be fewer than 2 insect fragments.

Work Step by Step

$P(x\lt2)=P(0)+P(1)=\frac{(0.3\times5)^0}{0!}e^{-0.3\times5}+\frac{(0.3\times5)^1}{1!}e^{-0.3\times5}=\frac{1}{1}e^{-1.5}+\frac{1.5}{1}e^{-1.5}=0.558$
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