The lifetime, in hours, of a head gasket of a cylinder in a car engine is distributed as lognormal with parameters a = 9.37 and 3 = 1.7. (a) Determine the mean. (b) Determine the standard deviation. (c) Find the probability that the lifetime of the head gasket is between 5349 and 8365 hours.

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 7E
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The lifetime, in hours, of a head gasket of a cylinder in a car engine is distributed as
lognormal with parameters a = 9.37 and 3 = 1.7.
(a) Determine the mean.
(b) Determine the standard deviation.
(c) Find the probability that the lifetime of the head gasket is between 5349 and
8365 hours.
Transcribed Image Text:The lifetime, in hours, of a head gasket of a cylinder in a car engine is distributed as lognormal with parameters a = 9.37 and 3 = 1.7. (a) Determine the mean. (b) Determine the standard deviation. (c) Find the probability that the lifetime of the head gasket is between 5349 and 8365 hours.
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ISBN:
9780321964038
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GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
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