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TI-86 Calculator Commands (Graphing) for Math 243
Syntax for this document
When I want to denote a key on your calculator I will write in bold letters. If I want to denote a yellow command above a key, I will write it in bold underlined. For example, 2nd , STAT refers to the 2nd key and the + key.
Calculator Basics
If you look at the calculator’s keys you will notice that above each key there is a word, or symbol in yellow. These are called
second commands. In order to activate these commands, you need to press the yellow key labeled 2nd first, then the key
underneath the yellow writing. Sometimes, when you press a button, instead of a command what you are accessing is a link
to another menu with links to other menus or commands. These menus are displayed at the bottom of the screen. For
example if you press the button GRAPH the following will be displayed at the bottom of the screen.
y(x)= RANGE ZOOM TRACE GRAPH
This is called a menu. To activate any of these choices (some are commands, and some lead to more menus) press the buttons ({F1, F2, F3, F4, F5}) directly underneath the word or symbol.
Notice that you can also enter letters by pressing the blue key called ALPHA first, followed by the key underneath the letter you want to appear in the screen. All the letters appear in blue on your calculator.
One menu you will be dealing with a majority of the time is the STAT menu.
Entering Data
To enter data press 2nd STAT. CALC EDIT PLOT DRAW VARS
Choose EDIT ( F2 ). This will link you to a table in which you may enter data. The names xStat, yStat and fStat are default names, of files you can store data. The file fStat is special and it is used to enter the frequency of a certain data set. Leave this column alone.
xStat yStat fStat
If there is data in a column you wish to enter new data, you can delete all the data by moving the black cursor onto the name, using the arrow keys, then press CLEAR, ENTER.
Suppose you need to enter the data shown below. Use the arrow keys to move around the table and enter the data. If you make a mistake in an entry, move the cursor to the data point where you made the mistake and type the correct value.
x 1 3 5 8 xStat yStat fStat y 3 7 10 12 1 3 5 8
The TI-86 allows you to enter more than one set of data. Suppose you also needed to enter this set of data.
Time 0 0.5 1 1.5 2 Height 0 16 24 24 16
Move the cursor to the fStat position. Use the arrow key to see another column to enter data. Enter the name TIME, by pressing the appropriate blue letters (do not press the blue key ALPHA since the calculator knows you are to type letters), then press ENTER when done. Press the arrow key again. Type HEIGHT, ENTER. Now enter the data as you did previously. If you have more data you can enter it by repeating the above procedure.
To leave the table where you enter data, press EXIT.
Standard deviation, mean, median, quartiles
Enter the data as explained above. Exit the table. Know press 2nd, STAT, CALC ( F1 ).
CALC EDIT PLOT DRAW VARS CALC EDIT PLOT DRAW VARS
OneVa TwoVa LinR LnR ExpR
Press OneVa ( F1 ); what this does is type the command to the screen. What you have to do next is tell it what file you would like to do the one variable statistics on. So, press 2nd, LIST to access the location of all the files. Next press NAMES ( F3 ). Now find the file where your data is stored (if you do not see your file, press the MORE key) and press the button underneath your file name. This will copy the file name to the screen. Press ENTER.
The calculator will give you the mean ( x ), standard deviation (Sx), the number of data points (n), and the five
number summary [ minX, Qrtl1, Med, Qrtl3,maxX].
Histogram
Enter the data as previously explained. Press 2nd, STAT, and PLOT ( F3 ) (see the first screen shot). Select either PLOT1, PLOT2, or PLOT3. If I where you, I would select PLOT3 ( F3 ), and dedicate plot 3 to histograms. After pressing one of the plot buttons you will see the second screen shot. By using your cursor, you need to change the settings as shown on the right. As you move the cursor the menu at the bottom will change to give you access to the appropriate commands so you can change the selection.
Change Type to HIST. Change Xlist Name = appropriate file name. We are almost ready to graph it. Press the GRAPH key, and select WIND (see the third screen shot). Change the values you see to fit your particular set of data. I have typed in bold, what each value indicates in making the histogram. After making the changes press GRAPH ( F5 ) to actually graph.
Box Plots
Enter data as previously explained. Again press 2nd, STAT, and PLOT, same instructions for creating a histogram. I would select PLOT2 , and dedicate it to box plots. Make sure that you have selected the plot to be ON. The only difference is when you select the type choose MBOX ( modified box plot). Press the GRAPH key, and select WIND (see the fourth screen shot). Change the values you see to fit your particular set of data. I have typed in bold, what each value indicates in making the box plot. After making the changes press GRAPH ( F5 ) to actually graph.
First Screen Shot Second Screen Shot
Third screen shot.
