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According to the U.S. Census Bureau, the mean of the commute time to work for a resident of Portland, Maine is 24.8 minutes. Assume

According to the U.S. Census Bureau, the mean of the commute time to work for a resident of Portland, Maine is 24.8 minutes. Assume that the standard deviation of the commute time is 4.2 minutes to complete parts (a) through (c). (a) What minimum percentage of commuters in Portland has a commute time within 3 standard deviations of the mean? % (Round to one decimal place as needed.)

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