Each of 150 newly manufactured items is examined and the number of scratches per item is recorded (the items are supposed to be free of scratches), yielding the following data: Number of scratches per item 0 1 2 3 4567 Observed frequency 18 37 42 30 13 7 2 1 Let X ¼ the number of scratches on a randomly chosen item, and assume that X has a Poisson distribution with parameter

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter9: Solving Quadratic Functions
Section: Chapter Questions
Problem 4CA
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Each of 150 newly manufactured items is examined and the number of scratches per item is
recorded (the items are supposed to be free of
scratches), yielding the following data:
Number of
scratches per item
0 1 2 3 4567
Observed
frequency
18 37 42 30 13 7 2 1
Let X ¼ the number of scratches on a randomly
chosen item, and assume that X has a Poisson
distribution with parameter 

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