The position of the graphically represented keys can be found by moving your mouse on top of the graphic. The function keys do not count as a row.
Turn your calculator on  
Press .  
Clearing the memory  
Press . Select item to delete (use arrow keys to find). Press (for purge). 
Entering data  
one variable  
Push (this puts you in STAT mode; the word STAT is above ). You will see a menu. The word singlevar is highlighted. Press . Press the white key A (it's leftmost on top). You will see a matrix. For simplicity, use the first column to enter the values. Type over any values already there. Type in the first number, followed by . Type in second number, followed by . Continue until all the data have been entered. Press after the last number in the data set (the second ENTER indicates the data set is complete).  
two variables  
Push (this puts you in STAT mode). You will see a menu. The word singlevar is highlighted. Press to Fit data... . Press . Press the white key A (it's leftmost on top). You will see a matrix. For simplicity, use the first column to enter the xvalues, the second column for the yvalues. Type over any values already there. Type in the first xvalue, followed by . Type in second xvalue, followed by . Continue until you have entered all the xvalues in the first column. Press after the last xvalue. Now press ... until you are at the top of the second column. Enter the first yvalue, then press and continue until you have entered all of the yvalues. Make sure the yvalues line up with the corresponding xvalues. Press after the last yvalue in the data set (the second ENTER indicates that the data set is complete). 
Calculating onevariable statistics  
mean (x)  
If you just entered the data, you should be in the right place. If not, press (gets you into stat mode). You should see a list of six options. Arrow over to mean, and press the white key C (middle key of the top row of white keys). You can also choose standard deviation at this point. Press .  
standard deviation for populations (s or s_{n})  
If you just entered the data, you should be in the right place. If not, press (gets you into stat mode). You should see a list of six options. Arrow over to st dev, and press the white key C (middle key of the top row of white keys). Right above the six choices you should see the word population. If you see the word sample instead, arrow up to it and press white key B. You'll see a menu. Arrow down to population, and press . You can also choose mean at this point. Press .  
standard deviation for samples (s or s_{n1})  
If you just entered the data, you should be in the right place. If not, press (gets you into stat mode). You should see a list of six options. Arrow over to st dev, and press the white key C (middle key of the top row of white keys). Right above the six choices you should see the word sample. If you see the word population instead, arrow up to it and press white key B. You'll see a menu. Arrow up to sample, and press . You can also choose mean at this point. Press . 
Calculating twovariable statistics 

r (correlation)  
If you just entered the data, you should be in the right place. If not, press (gets you into stat mode). Press the white key F (rightmost key of the top row of white keys). Press .  
regression coefficients  
slope  
If you just entered the data, you should be in the right place. If not, press (gets you into stat mode). Press the white key F (rightmost key of the top row of white keys). Press . The HP48G gives you the whole regression line. The slope is the coefficient on the x term.  
yintercept  
If you just entered the data, you should be in the right place. If not, press (gets you into stat mode). Press the white key F (rightmost key of the top row of white keys). Press . The HP48G gives you the whole regression line. The yintercept is the term without the x. 
Calculating combinations and permutations  
combinations (nCr)  
Enter the n value, , the r value, and again. (Yes, HPs use Reverse Polish Notation.) Press , followed by white key A. (There will be a row of words on the bottom of the screen. PROB will be the first.) Press white key A again (COMB is the first word on the bottom of the screen.)  
permutations (nPr)  
Enter the n value, , the r value, and again. (Yes, HPs use Reverse Polish Notation.) Press , followed by white key A. (There will be a row of words on the bottom of the screen. PROB will be the first.) Press white key B (PERM is the second word on the bottom of the screen.) 
Turning the calculator off  
Press and the calculator will turn off. 
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  
2: Enter the data 
(STAT)
white key A

3: Compute the mean  white key C 
4: Compute the population standard deviation.  white key C 
5: Compute the sample standard deviation:  white key C 
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  
2: Enter the data 
(STAT)
white key A 
3: Compute slope of regression line  ( , if necessary) white key F 
4: Compute yintercept of regression line  ( , if necessary) white key F 
5:Compute the slope of the regression line:  ( , if necessary) white key F 
C: Find _{10}C_{6} and _{9}P_{5}.
1: Compute _{10}C_{6}  white key A, white key A 
2: Compute _{9}P_{5}  white key A, white key B 
You should get _{10}C_{6 }= 210 and _{9}P_{5}=
15120.
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