The file Sedans contains the overall miles per gallon (MPG) of 2013 midsized sedans:

Source: Data extracted from "Ratings," Consumer Reports, April 2013, pp. 30-31.
a. Compute the mean, median, and mode.
b. Compute the variance, standard deviation, range, coefficient of variation, and Z scores.
c. Are the data skewed? If so, how?
d. Compare the results of (a) through (c) to those of Problem 3.12 (a) through (c) that refer to the miles per gallon of small SUVs.

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