Average power usage (in dB per hour) for a particular company is studied and it is...

Average power usage (in dB per hour) for a particular company is studied and

it is found to have a lognormal distribution with parameters μ = 4 and σ = 2.

(a) What is the probability that the company uses more than 235.1 dB during any

particular hour?

(b) Find the 15.39-th percentile of the power usage for this company during any partic-

ular hour.

(c) How much power is this company expected to use during any particular hour?

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