The position of the graphically represented keys can be found by moving your mouse on top of the graphic.
Turn your calculator on  
Press .  
Clearing the memory  
Press (you should see scl above the key, scl means Statistical CLear.) Press . 
Entering data  
one variable  
Enter the first number. Press . Enter the second number, followed by . Continue until you have entered all of the numbers.  
two variables  
Clear the memory. Enter the first xvalue, press , and enter the corresponding yvalue. Press . Continue until you have entered all of the numbers. 
Calculating onevariable statistics  
mean (x)  
Press . (You should see x above the 1 key.)  
standard deviation for populations (s or s_{n})  
Press . (You should see s_{n} above the 2 key.)  
standard deviation for samples (s or s_{n1})  
Press . (You should see s_{n1} above the 3 key.) 
Calculating twovariable statistics You must press to get into the regression mode. Enter the data and follow the instructions below. 

r (correlation)  
Press . You should see the letter r above the left parenthesis key.  
regression coefficients  
slope  
Press . You should see the letter A above the seven key.  
yintercept  
Press . You should see the letter B above the eight key. 
Calculating combinations and permutations  
combinations (nCr)  
Enter the n value. Press . Enter the r value and press .  
permutations (nPr)  
Enter the n value. Press (you should see nPr above the key). Enter the r value and press . 
Turning the calculator off  
Press . If you forget, the calculator will turn itself off in five minutes. 
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
e^{x} as
(e^{x}).
A: What is the mean and standard deviation of the following list of numbers?
15 16 20 21
1: Clear Memory  (scl) 
2: Enter the data 

3: Compute the mean  (x) 
4: Compute the population standard deviation.  (s_{n}) 
5: Compute the sample standard deviation:  (s_{n1}) 
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  ( scl) 
2: Enter Data  
3: Compute the slope of the regression line  (A) 
4: Compute the yintercept of the regression line.  (B) 
5: Compute the correlation.  (r) 
You should get a slope of 1.6, a yintercept of 0.5, and a
correlation of 0.992277876.
The regression line would be: y = 1.6x + 0.5.
1: Compute _{10}C_{6}  
2: Compute _{9}P_{5}  (nPr) 
You should get _{10}C_{6 }= 210 and _{9}P_{5}=
15120.
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