6.86 The length of time, in seconds, that a computer user takes to read his or her e-mail is distributed as a lognormal random variable with u = 1.8 and o² = 4.0. al) What is the probability that a user reads e-mail for more than 20 seconds? a2) What is the probability that a user reads e-mail for more than a minute? b) What is the probability that a user reads e-mail for a length of time that is less than the mean of the underlying lognormal distribution?

6.86 The length of time, in seconds, that a computer user takes to read his or her e-mail is distributed as a lognormal random variable with u = 1.8 and o² = 4.0. al) What is the probability that a user reads e-mail for more than 20 seconds? a2) What is the probability that a user reads e-mail for more than a minute? b) What is the probability that a user reads e-mail for a length of time that is less than the mean of the underlying lognormal distribution?

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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