Box Plot

A box plot is a plot based on averages. The line inside the box represents the median. The two lines at the beginning and end of the graph are the smalled and larges value. To get the two ends of the box you have to take two different means. You take the mean of everything between the median and the lowest value to get the left side of the box, and the mean of everything between the median and the highest value to get the right side of the box. From this graph most of the snow depth is between 50 and about 105. The most snow they got was about 125 and the least snow they got was around 30.

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