Gasoline. In March 2006, 16 gas stations in Grand Junction, Colorado, posted these prices for a gallon of regular gasoline:
2.22 2.21 2.45 2.24
2.27 2.28 2.27 2.23
2.26 2.46 2.29 2.32
2.36 2.38 2.33 2.27
a) Make a stem-and-leaf display of these gas prices. Use split stems; for example, use two 2.2 stems, one for prices between $2.20 and $2.24, the other for prices from $2.25 to $2.29.
b) Describe the shape, center, and spread of this distribution.
c) What unusual feature do you see?