Question: The maximum wind velocity in a tornado at a given city follows a lognormal distribution with a mean of 90 mph and a standard

The maximum wind velocity in a tornado at a given city follows a lognormal distribution with a mean of 90 mph and a standard deviation of 18 mph. a) What is the probability that the maximum wind velocity will exceed 120 mph during the next tornado? b) Determine the design tornado wind velocity whose return period is 100 yr. Assume one tornado will strike this city each year

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