Question 1: The amount of time until an accident occurs at an industrial facility follows an exponential distribution with mean 40 days. a) What is the probability that the next accident occurs between 50 and 100 days? b) What is the probability that the time until an accident occurs exceeds the mean time by more than 2 standard deviations? c) Suppose it has been at least 30 days with no accidents. What is the probability that it will be at least 80 days until an accident occurs?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Question 1: The amount of time until an accident occurs at an industrial facility follows an
exponential distribution with mean 40 days.
a) What is the probability that the next accident occurs between 50 and 100 days?
b) What is the probability that the time until an accident occurs exceeds the mean time by
more than 2 standard deviations?
c) Suppose it has been at least 30 days with no accidents. What is the probability that it will
be at least 80 days until an accident occurs?
Transcribed Image Text:Question 1: The amount of time until an accident occurs at an industrial facility follows an exponential distribution with mean 40 days. a) What is the probability that the next accident occurs between 50 and 100 days? b) What is the probability that the time until an accident occurs exceeds the mean time by more than 2 standard deviations? c) Suppose it has been at least 30 days with no accidents. What is the probability that it will be at least 80 days until an accident occurs?
d) What is the value of the median time until an accident occurs?
Transcribed Image Text:d) What is the value of the median time until an accident occurs?
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