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

as reported by 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 the time of a randonly selected finisher.

Find P[43<X<70]. Round your answer to three decimal points.

Expert Solution

here z table is attached you can verify values.. .rate plz if you satisfy with answer

orchestra answered 2 years ago

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 mean 61 minutes and standard deviation 9 minutes. a.Determine the percentage of finishers who have times between 50 and 70 minutes. b. Obtain and interpret the 40th percentile for the finishing times. c. Find the middle 30% of the finishing times.

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