The following gasoline tax per gallon data for each of the 50 U. S. states and the District of Columbia ( DC) were listed in the article €œ Paying at the Pump€ ( AARP Bulletin, June 2010).
a. Construct a stem- and- leaf display of these data.

b. Based on the stem- and- leaf display, what do you notice about the center and spread of the data distribution?
c. Do any values in the data set stand out as unusual? If so, which states correspond to the unusual observations and how do these values differ from the rest?

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