Based on samples of residents in Barnstable County, Massachussetts from 2009 to 2014, the mean travel times

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Based on samples of residents in Barnstable County, Massachussetts from 2009 to 2014, the mean travel times to work in 15 towns are

imagea) What is the average travel time to work for residents of Barnstable County?
b) Find the median travel time to work for residents of Barnstable County.
c) What is the variance of travel time to work for Barnstable County?
d) Find the standard deviation of travel time to work for residents of Barnstable County.

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