Box and Whisker Plot: a graphic representation of a set of data that shows the median, average, and measures of dispersion.
A box and whisker plot provides a visual representation of numerical data, and makes it easy to determine outliers in the data. This plot shows the page count of Wired Magazine in relation to the December page count, which is the line horizontal line through the center. By noting how far removed (or not removed) from the center line the box is, the viewer can determine how many more (or less) pages were in each issue. As can be seen from this plot, every other issue had less pages than the December issue, with November being the closest contender in page number.
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