San Diego State University Operations And Supply Chain Management Assignment Help - Standard

Question - The lifetime of a semiconductor laser has a lognormal distribution, and it is known that the mean and
standard deviation of lifetime are 10,000 and 20,000, respectively.
(a) Calculate the parameters of the lognormal distribution
(b) Determine the probability that a lifetime exceeds 10,000 hours
(c) Determine the lifetime that is exceeded by 90% of lasers

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