The ``stem'' is a column of the data with the last digit removed. The final digits of each column are placed next to each other in a row next to the appropriate column. Then each row is sorted in numerical order. This diagram was invented by John Tukey.

**References**

Tukey, J. W. *Explanatory Data Analysis.* Reading, MA: Addison-Wesley, pp. 7-16, 1977.

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1999-05-26