Answer
a)mean=133.39
b)0.035
c)very unlikely.
Work Step by Step
a) Here, $mean=\frac{5469}{41}=133.39.$
b)$P(X=133)=\frac{133.39^{133}\cdot e^{-133.39}}{133!}=0.035.$
c)The result in b) is really small, therefore it is very unlikely.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 5 - Discrete Probability Distributions - 5-5 Poisson Probability Distributions - Basic Skills and Concepts - Page 233: 10
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