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Data on the gasoline tax per gallon ( in cents) as of April 2010 for the 50 U. S. states and the District of Columbia ( DC) are shown below ( AARP Bulletin, June 2010).
a. The smallest value in the data set is 8.0 (Alaska), and the largest value is 48.6 ( California). Are these values outliers? Explain.
b. Construct a boxplot for this data set and comment on the interesting features of the plot. |
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