The length of time for one individual to be served at a cafeteria is a random variable having an exponential distribution with a mean of 4 minutes (a) What’s the probability that a person waits between 3 and 5 min? (b) What’s the probability that the waiting time to be served exceeds the mean wait time by more than 2 standard deviations? (c) What is the probability that a person is served in less than 3 minutes on at least 5 of the next 6 days?
The length of time for one individual to be served at a cafeteria is a random variable having an exponential distribution with a mean of 4 minutes (a) What’s the probability that a person waits between 3 and 5 min? (b) What’s the probability that the waiting time to be served exceeds the mean wait time by more than 2 standard deviations? (c) What is the probability that a person is served in less than 3 minutes on at least 5 of the next 6 days?
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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The length of time for one individual to be served at a cafeteria is a random variable having an exponential distribution with a
mean of 4 minutes -
(a) What’s the
probability that a person waits between 3 and 5 min?-
(b) What’s the probability that the waiting time to be served exceeds the mean wait
time by more than 2 standard deviations?
(c) What is the probability that a person is served in less than 3 minutes on at least
5 of the next 6 days?
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