A box plot or a box and whisker diagram like the one shown above summarizes the distribution of a set of data using the median, minimum extreme, maximum extreme, and quartiles. The box plot comes in very handy when needing to compare multiple sets of data. The graph above is depicting the daily mean temperature in degrees Fahrenheit (F) for the month of November 1940, in Madison, Wisconsin. By using the box plot to display the data it is easy to gather the data off of the graph. The minimum extreme temperature for the month was a chilling 13 F, 23 F for quartile 1, 44 F for quartile 3, a median of 35.5 F, and a maximum temperature of 55 F.
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