Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection.
Question:
Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection.
a. Among 15 randomly selected cars, what is the probability that at most 5 fail the inspection?
b. Among 15 randomly selected cars, what is the probability that between 5 and 10 (inclusive) fail to pass inspection?
c. Among 25 randomly selected cars, what is the mean value of the number that pass inspection, and what is the standard deviation of the number that pass inspection?
d. What is the probability that among 25 randomly selected cars, the number that pass is within 1 standard deviation of the mean value?
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Related Book For 
Statistics The Exploration And Analysis Of Data
ISBN: 9781133171744
007th Edition
Authors: Roxy Peck, Ay L Devore
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