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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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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