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According to the US Census Bureau, the mean of the commute time to work for a resident of Boston, Massachusetts, is 27.3 minutes. Assume that the standard deviation of the commute time is 8.1 minutes to answer the following (use Chebyshev's rule):

 

a) What minimum percentage of commuters in Boston has a commute time within 2 standard deviations of the mean?

b)What mimimum percentage of commuters in boston hjas a commute time within 1.5 standard deviations of the mean?

c)Why are we using Chebyshev's rule/

 

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