The position of the graphically represented keys can be found by moving your mouse on top of the graphic. 

Turn your calculator on
Press Row 9, Column 1 Bottom Left Corner .
Clearing the memory
Press Row 1, Column 1 Row 4, Column 3 (you should see STAT above the key). A menu is displayed with three choices. Press so that the word CLRDATA is underlined. Press Bottom Right Corner (should say ENTER above it). 

 

Entering data
one variable
Press Row 1, Column 1, then Row 4, Column 3 (you should see STAT above the key). A menu is displayed with three choices. The 1-VAR option should be underlined. Press Bottom Right Corner Row 4, Column 3. If 1-VAR is not underlined, use arrow keys to underline it. Type in the first data element, then press . If the number shows up more than once in the list, enter how many times it appears and press . You should see FRQ= (frequency). If the data element only occurs once, press the twice. (The second time confirms that you only want to enter the number once.) Continue until the last data element. You must press Bottom Right Corner to finish. 
two variables
Press Row 1, Column 1 Row 4, Column 3 (you should see STAT above the key). A menu is displayed with three choices. Press once so that the word 2-VAR is underlined. Press Bottom Right Corner Row 4, Column 3. Type in the x value, press , then the corresponding y value, and . Repeat for all ordered pairs. Press Bottom Right Corner after the last pair.

 

Calculating one-variable statistics
mean (x)
Press Row 4, Column 4. On the top of the screen, you'll see a list of the values the calculator computes. Use to move the cursor to  x (it's the second thing in the list.) The mean value will be on the screen.
standard deviation for populations (s or sn)
Press Row 4, Column 4. On the top of the screen, you'll see a list of the values the calculator computes. Use the to move the cursor to sx (it's the fourth thing in the list.) The population standard deviation will be on the screen.
standard deviation for samples (s or sn-1)
Press Row 4, Column 4. On the top of the screen, you'll see a list of the values the calculator computes. Use the to move the cursor to Sx (it's the third thing in the list.) The sample standard deviation will be on the screen.

Calculating two-variable statistics
r (correlation)
Press Row 4, Column 4. On the top of the screen, you'll see a list of the values the calculator computes. Use the to move the cursor to r (it's the tenth thing in the list.) The correlation will be on the screen.
regression coefficients
slope
Press Row 4, Column 4. On the top of the screen, you'll see a list of the values the calculator computes. Use the to move the cursor to a (it's the eighth thing in the list.) The slope will be on the screen.
y-intercept
Press Row 4, Column 4. On the top of the screen, you'll see a list of the values the calculator computes. Use the to move the cursor to b (it's the ninth thing in the list.) The correlation will be on the screen.


Calculating combinations and permutations

Make sure you get out of the STAT mode before doing these. To get out of STAT mode, press Row 1, Column 1 Row 4, Column 4 (says EXIT STAT on top of the key).
combinations (nCr)
Enter the n value. Press Row 4, Column 2 (short for PRoBability). On the top of the screen, you'll see a list of the values the calculator computes. Use to move the cursor to nCr (it's the second thing in the list.) Enter the r value, then press Bottom Right Corner.
permutations (nPr)
Enter the n value. Press Row 4, Column 2 ( short for PRoBability). On the top of the screen, you'll see a list of the values the calculator computes. Use to move the cursor to nPr (it's the first thing in the list.) Enter the r value, then press Bottom Right Corner.

 

Turning the calculator off
Press Row 1, Column 1 Row 9, Column 1 Bottom Left Corner. (You should see the word OFF above the key.)

 

Worked Out Examples

In the following examples, we list the exact key sequence used to find the answer.  We will list the keys by the main symbol on the key.  In parentheses, we will list a helpful mnemonic, e.g. we will list ex as (ex).


A: What is the mean and standard deviation of the following list of numbers?

15      16      20      21

1: Clear Memory  Row 1, Column 1 Row 4, Column 3 (CLRDATA) Bottom Right Corner
2: Enter Data  Row 1, Column 1 Row 4, Column 3 Bottom Right Corner Row 4, Column 3  Bottom Right Corner 
3: Compute the mean  Row 4, Column 4  
4: Compute the standard deviation (population)  Row 4, Column 4
5: Compute the standard deviation (sample)  Row 4, Column 4


     You should get a mean of 18, population standard deviation of 2.549509757 and a sample standard deviation of 2.943920289.

B: Find the linear regression line for the following table of numbers. Also, find the correlation.

x 1 2 3 4
y 2 4 5 7

1: Clear Memory  Row 1, Column 1 Row 4, Column 3 (CLRDATA) Bottom Right Corner
2: Enter Data  Row 1, Column 1 Row 4, Column 3 Bottom Right Corner Row 4, Column 3
3: Compute the slope of the regression line  Row 4, Column 4 (seven times)
4: Compute the y-intercept of the regression line  Row 4, Column 4 (eight times)
5: Compute the correlation  Row 4, Column 4 (nine times)


    You should get a slope of 1.6, a y-intercept of 0.5, and a correlation of 0.992277876.
    The regression line would be: y = 1.6x+0.5.

C: Find 10C6 and 9P5.
1: Compute 10C6  Row 1, Column 1 Row 4, Column 4 Row 4, Column 2 (nCr) Bottom Right Corner 
2: Compute 9P5  Row 1, Column 1 Row 4, Column 4 Row 4, Column 2 (nPr) Bottom Right Corner 

You should get 10C6 = 210 and 9P5= 15120.

 

Go to: 

TI's online manual sample problem set Home page
1