The graph above is an example of a stem and leaf plot. Stem and leaf plots are useful geovisualizations. The graph above does a good job describing how the data is plotted, as a lower measure of a number is plotted against the higher measure. In this case, the ones place is plotted against the tens place. This type of data recording makes it easy to measure mean values, as well as medians and modes. For example, the median in the graph above is 83, as it is obviously smack dab in the middle of all the other data values.
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