The long-distance calls made by the employees of a company are normally distributed with a mean of 6.3 minutes and a standard deviation of 2.2 minutes. Find the probability that a call a) lasts between 5 and 10 minutes. b) lasts more than 7 minutes. c) lasts less than 4 minutes.
The long-distance calls made by the employees of a company are normally distributed with a mean of 6.3 minutes and a standard deviation of 2.2 minutes. Find the probability that a call a) lasts between 5 and 10 minutes. b) lasts more than 7 minutes. c) lasts less than 4 minutes.
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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Transcribed Image Text:The long-distance calls made by the employees of a company
are normally distributed with a mean of 6.3 minutes and a
standard deviation of 2.2 minutes. Find the probability that a
call
a) lasts between 5 and 10 minutes.
b) lasts more than 7 minutes.
c) lasts less than 4 minutes.
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