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One-hour carbon monoxide concentrations in air samples
Chapter 4, Problem 94E(choose chapter or problem)
Problem 94E
One-hour carbon monoxide concentrations in air samples from a large city have an approximately exponential distribution with mean 3.6 ppm (parts per million).
a Find the probability that the carbon monoxide concentration exceeds 9 ppm during a randomly selected one-hour period.
b A traffic-control strategy reduced the mean to 2.5 ppm. Now find the probability that the concentration exceeds 9 ppm.
Questions & Answers
QUESTION:
Problem 94E
One-hour carbon monoxide concentrations in air samples from a large city have an approximately exponential distribution with mean 3.6 ppm (parts per million).
a Find the probability that the carbon monoxide concentration exceeds 9 ppm during a randomly selected one-hour period.
b A traffic-control strategy reduced the mean to 2.5 ppm. Now find the probability that the concentration exceeds 9 ppm.
ANSWER:
Step1 of 4: Goal
a
Find the probability that the carbon monoxide concentration exceeds 9 ppm during a randomly selected one-hour period.
b
Find the probability that the concentration exceeds 9 ppm with a reduced mean of 2.5 ppm.