A Stem and leaf plot is a method for showing the frequency with which certain classes of values occur. Typically the "stem" is the left hand column containing the tens digits and the "leaf" is in the right column and contains the ones.
This example shows the heights of 200 adults. The left (tens column) contains the number of whole inches and the right column (ones) shows the decimal of that inch. When a number is repeated in the ones column, more than one person was that height.
http://nyjm.albany.edu:8000/~reinhold/m308/Assgnmt1_HowTo.htm
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