# solution

For the data in Exercise 2:

a) Would you expect the mean purchase to be smaller than, bigger than, or about the same size as the median? Explain.

b) Find the mean purchase.

c) Find the median purchase.

Exercise 2

As the new manager of a small convenience store, you want to understand the shopping patterns of your customers. You randomly sample 20 purchases from yesterdayâ€™s records (all purchases in U.S. dollars):

a) Make a histogram of the data using a bar width of \$20.

b) Make a histogram of the data using a bar width of \$10.

c) Make a relative frequency histogram of the data using a bar width of \$10.

d) *Make a stem-and-leaf plot of the data using \$10 as the stems and putting the smallest amounts on top and round the data to the nearest \$.

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