http://mainland.cctt.org/mathsummer/JosephBond/StemAndPlots/stem-and-leaf_std.htm
Stem and Leaf plots are simply an easy was of categorizing data. With small amounts of data, these plots make it easy to categorize the data in numerical order. The above plot represents the per capita GNP in Western Africa. The incomes are represented in an easy to find way to make it easier on the viewer.
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