Box Plot

http://www.itl.nist.gov/div898/handbook/eda/section3/boxplot.htm

A box plot is a graphic representation of data in the shape of a rectangle. In addition, it has extensions, which indicate the maximum and minimum values, and have markers showing the median, and the first and third quartiles. This box plot is comparing the energy output of four machines. The results show that the machines output has a significant effect on energy in accordance to location and variation. Machine 3 has the greatest energy response with an output of about 72.5. Machine 4 has the lowers energy response with an output of about 67.5.