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Stem and leaf plot
A Back-To-Back Stem and Leaf Plot is a diagram to show two different sets of numbers. They are exactly like ordinary stem and leaf plot, but represents two different numbers by going out to the left as well as the right.
Ages of people are sorted meaningfully by a stem and leaf plot. Any type of data set in which the first or last digit differs and can be sorted. By using this type of plot, one can readily see the magnitude of each group of data sorted.
A stem and leaf plot is one type of histogram. A simple bar chart histogram show the frequency of data in certain ranges. The leaf and stem plot has the advantage of identifying both the frequency of the data in intervals and the data values that are in the intervals. Two disadvantages to the plot is that the interval is determined by the uppermost digit (10's, 100's or 1000's) and the plot may not be easily understood by others. See related link.
A double stem and leaf plot is a stem and leaf plot but there is a number in the middle and one number on each side to distibute data