The position of the graphically represented keys can be found by moving your mouse on top of the graphic. The round buttons on the top do not constitute a row. Row 1 begins with the x^{1} key.
Turn your calculator on  
Press .  
Clearing the memory  
For
one variable problems, press
to get
into SD (standard deviation) mode. Then press
(the scl above the key means statistical clear)
.
For two variable problems press (REG, for regression) (for linear regression), then . 
Entering data  
one variable  
Clear the memory as shown above. Enter each element of your list followed by the key. (The DT below the key stands for DaTa.)  
two variables  
Clear the memory as shown above. Enter the first xvalue in your list, followed by , followed by the first yvalue in your list. Then press . (The DT below the key stands for DaTa.) Enter the remaining pairs in the same manner: xvalue, comma, yvalue, . 
Calculating onevariable statistics  
mean (x)  
Press (x)  
standard deviation for populations (s or s_{n})  
Press (xsn)  
standard deviation for samples (s or s_{n1})  
Press (xsn1) . 
Calculating twovariable statistics 

r (correlation)  
Press (r) .  
regression coefficients  
slope  
Press (B) .  
yintercept  
Press (A) . 
Calculating combinations and permutations  
combinations (nCr)  
Enter the nvalue. Press . Enter the rvalue, followed by .  
permutations (nPr)  
Enter the nvalue. Press (nPr will appear above the key). Enter the rvalue, followed by . 
Turning the calculator off  
Press . 
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  (SD) (scl) 
2: Enter Data  
3: Compute the mean  (x) 
4: Compute the population standard deviation  (xsn) 
5: Compute the sample standard deviation  (xsn1) 
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  (REG) (linear) 
2: Enter Data  
3: Compute the slope of the regression line  ( B) 
4: Compute the yintercept of the regression line  ( A) 
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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