(Answered) Among us cities with a population of more than 250000 the

Statistics

Among U.S. cities with a population of more than 250,000 the mean one-way commute to work is 24.3 minutes. The longest one-way travel time is New York City, where the mean time is 37.9 minutes. Assume the distribution of travel times in New York City follows the normal probability distribution and the standard deviation is 6.9 minutes.

(a) What percent of the New York City commutes are for less than 29 minutes?

(b) What percent are between 29 and 35 minutes?

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