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Box-and-Whisker Plot
The TI-83, TI-83 Plus, and TI-84 Plus calculators will take a list of data and automatically draw
a box-and-whisker plot for that data. Since there are a number of different types of plots
available on the calculator, it is important to make sure that all other plots are turned off before
you begin or you graph will be cluttered with several unrelated plots being graphed at the same
time. Even worse, it is possible for previous plots to become invalid or the data sets that were
used before are changed or deleted, causing an error whenever you try to graph anything new.
Before you begin any plotting:
• Press the Y= key at the top left of the keyboard, and delete or deselect
any equations being plotted there.
• Press STAT PLOT (above the Y= key) and choose 4 to turn off any
other statistical plots.
There are three stages to creating a box-and-whisker plot.
1. Enter the data into a list as before.
2. Tell the calculator what kind of plot you want.
3. Tell the calculator what size to draw the window for the plot.
Example: Household Incomes
The following numbers represent household incomes in thousands of dollars for twelve
households:
35 29 44 72 34 64 41 50 54 104 39 58
We’ll use this data to construct a box-and-whisker plot.
First store the data in the list L1.
Press the 2
nd
key and then press the Y= key to get to
STATPLOT.
Press the number 1 key.
Move the cursor to On and press the ENTER key.
Use the arrow keys and highlight the box-and-whisker
plot picture.
Type L1 in for Xlist:
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