You can use your TI-84 Plus calculator to construct a box plot for your data. Press [2nd][Y=][2] to access **Plot2**. Follow Steps 1 through 9 for constructing a histogram. In Step 5, select the Box Plot symbol, which looks a bit like a battery turned on its side; see the first screen. If you adjust the viewing window, you can display a histogram and a box plot in the same viewing window (as shown in the second screen).

If your data has *outliers* (data values that are much larger or smaller than the other data values), consider constructing a modified box plot instead of a box plot. The third screen illustrates both a standard box plot and a modified box plot of the same data.

In a modified box plot, the whiskers represent data in the range defined by 1.5(Q3 – Q1), and the outliers are plotted as points beyond the whiskers. The steps for constructing box plots and modified box plots are the same, except in Step 5 you select the modified box plot symbol.