Histogram

This map was taken from http://www.pqsystems.com/qualityadvisor/DataAnalysisTools/histogram.php

This is a good example of a histogram.  A histogram allows the viewer to see the distribution of the data and what shape the data takes.  It is also a good visual way to see how the central limit theorem works.  The data is set at continuous intervals that are connected unlike a bar graph that looks at the intervals or points discretely.