As reported in "Runner's World" magazine, the times of the finishers in the New York City...

As reported in "Runner's World" magazine, the times of the finishers in the New York City 10 km run are normally distributed with a mean of 61 minutes and a standard deviation of 9 minutes. Let x denote finishing time for the finishers.

a) The distribution of the variable x has mean____ and standard deviation____ .

b) The distribution of the standardized variable z has mean____ and standard deviation____ .

c) The percentage of finishers with times between 60 and 80 minutes is equal to the area under the standard normal curve between____ and____ .

d) The percentage of finishers with times exceeding 86 minutes is equal to the area under the standard normal curve that lies to the____ of____ .

Expert Solution

milcah answered 1 year ago

as reported by runner’s world magazine, the times of the finishers in the new york city...

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