A box plot, or box-and-whisker plot, is a way of graphically depicting groups of numerical data through their quartiles. To make a box plot, the data is first arranged in numerical order and divided into quartiles. A box is drawn from the first quartile to the third quartile, with a line drawn inside the box at the second quartile (the median). Whiskers extend from the edges of the box to show the range of the rest of the data. Outliers are data points that fall outside the whiskers and are plotted as individual points.
