The lifetime (in days) of a certain electronic component that operates in a high temperature environment is lognormally distributed with 1 2 and 0 4 a Find the mean lifetime b Find the probability that a component lasts between three and six days c Find the median lifetime d Find the 90th percentile of the lifetimes

Question: The lifetime (in days) of a certain electronic component that operates in a high-temperature environment is lognormally distributed with = 1.2 and =

The lifetime (in days) of a certain electronic component that operates in a high-temperature environment is lognormally distributed with μ = 1.2 and σ = 0.4.
a. Find the mean lifetime.
b. Find the probability that a component lasts between three and six days.
c. Find the median lifetime.
d. Find the 90th percentile of the lifetimes.

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