Box Plot

http://edubuzz.org/blogs/nbhs3x1/2007/01/08/8-jan-2007-five-figure-summary-and-box-plots/

A box plot provides a simple graphical summary of a set of data. It shows a measure of central location (the median), the average (the mean), and measures of dispersion (the mode). On the box plot above, the median is 77.5