The average number of times Americans dine out in a week fell from 4.0 in 2008 to 3.8 in 2012 (Zagat.com, April 1, 2012). The number of times a sample of 20 families dined out last week provides the following data.

a. Compute the mean and median.
b. Compute the first and third quartiles.
c. Compute the range and inter-quartile range.
d. Compute the variance and standard deviation.
e. The skewness measure for these data is 0.34. Comment on the shape of this distribution.
Is it the shape you would expect? Why or why not?
f. Do the data contain outliers?

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