The length of time (in seconds) that a user views a page on a Web site before moving to another page is a lognormal random variable with parameters 0 = 0.5 and w² = 1.44. (a) What is the probability that a page is viewed for more than 10 seconds? i (Round the answer to 4 decimal places.) (b) By what length of time have 50% of the users moved to another page? i seconds (Round the answer to 2 decimal places.) (c) What is the mean and standard deviation of the time until a user moves from the page? Mean = seconds (Round the answer to 2 decimal places.) Standard deviation = seconds (Round the answer to 2 decimal places.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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The length of time (in seconds) that a user views a page on a Web site before moving to another page is a lognormal random variable
with parameters 0 = 0.5 and w²
= 1.44.
(a) What is the probability that a page is viewed for more than 10 seconds?
i
(Round the answer to 4
decimal places.)
(b) By what length of time have 50% of the users moved to another page? i
seconds (Round the answer to
2 decimal places.)
(c) What is the mean and standard deviation of the time until a user moves from the page?
Мean %3D
i
seconds (Round the answer to 2 decimal places.)
Standard deviation = i
seconds (Round the answer to 2 decimal places.)
Transcribed Image Text:The length of time (in seconds) that a user views a page on a Web site before moving to another page is a lognormal random variable with parameters 0 = 0.5 and w² = 1.44. (a) What is the probability that a page is viewed for more than 10 seconds? i (Round the answer to 4 decimal places.) (b) By what length of time have 50% of the users moved to another page? i seconds (Round the answer to 2 decimal places.) (c) What is the mean and standard deviation of the time until a user moves from the page? Мean %3D i seconds (Round the answer to 2 decimal places.) Standard deviation = i seconds (Round the answer to 2 decimal places.)
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