Histogram

http://test.cita.illinois.edu/aria/longdesc/longdesc1.php

The histogram is a graphical display of data that is grouped into ranges and then arranged into rectangular bars.  The histogram in similar to the bar graph except for each bar represents a range of data. This histogram shows the heights of black Cherry trees.  The results show that the average black cherry tree is between 75 and 80 feet tall.