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 4 - Column 1.
Clearing the memory
Press Row 4, Column 2 It's yellower than it looks here Row 3, Column 2 GSB = Gosub used in programming.  You should see S above the key. (i.e. clear the sum registers.)

 

Entering data
one variable
Enter the first value.  Press Row 4, Column 9.  (You will see a 1 on the screen because you have entered one data point.)  Enter the next value.  Press Row 4, Column 9.  (You will see a 2 on the screen because you have entered two data points.) Continue until all the data has been entered. 
two variables
Enter the first y-value.  Press Row 3 and 4, Column 6 It's the long key in the middle..  Enter the corresponding x-value then Row 4, Column 9.  Notice that this is the reverse of the usual order.  Welcome to Reverse Polish Notation.  Enter the other ordered pairs in the same way:  y-value first. 

 

Calculating one-variable statistics
mean (x)
Press Row 4, Column 3 It's Blue. Row 4, Column 7.  (You should see x in blue on the bottom of the key.) 
standard deviation for populations (s or sn)
Enter the mean.  Press Row 4, Column 9.  Press Row 4, Column 3 It's Blue. Row 4, Column 8.  (You should see s in blue on the bottom of the key.) 
standard deviation for samples (s or sn-1)
Press Row 4, Column 3 It's Blue. Row 4, Column 8.  (You should see s in blue on the bottom of the key.) 

Calculating two-variable statistics
r (correlation)
Press Row 4, Column 2 It's yellower than it looks here Row 4, Column 8.  (You should see y-hat, r in yellow above the key.)  The number on the screen is y-hat.  Press Row 3, Column 4. The correlation will appear on the screen.
regression coefficients
slope
Press Row 4, Column 2 It's yellower than it looks here Row 4, Column 9.  (You should see L.R. in yellow above the key.  L.R. stands for linear regression.)  The number on the screen is the y-intercept.  Press Row 3, Column 4.  The slope will appear on the screen.
y-intercept
Press Row 4, Column 2 It's yellower than it looks here Row 4, Column 9.  (You should see L.R. in yellow above the key.  L.R. stands for linear regression.)  The number on the screen is the y-intercept.


Calculating combinations and permutations
combinations (nCr)
Enter the n value.  Press Row 3 and 4, Column 6 It's the long key in the middle..  Enter the r value.  Press Row 4, Column 3 It's Blue. Row 4, Column 10.  (You should see C y,x in blue on the bottom of the key.) 
permutations (nPr)
Enter the n value.  Press Row 3 and 4, Column 6 It's the long key in the middle..  Enter the r value.  Press Row 4, Column 2 It's yellower than it looks here Row 4, Column 10.  (You should see P y,x in yellow above the key.)

 

Turning the calculator off
Press Row 4 - Column 1.  If it's on, it will turn off.  So don't use it to clear the screen.

 

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 4, Column 2 It's yellower than it looks here Row 3, Column 2 GSB = Gosub used in programming (S)
2: Enter Data   Row 7, Column 1 Row 6, Column 2 Row 4, Column 9 Row 7, Column 1 Row 6, Column 3 Row 4, Column 9 Row 7, Column 2   
 Row 8, Column 1 Row 4, Column 9 Row 7, Column 2 Row 7, Column 1 Row 4, Column 9
3: Compute the mean  Row 4, Column 3 It's Blue. Row 4, Column 7 (x) 
4: Compute the population standard deviation  Row 4, Column 3 It's Blue. Row 4, Column 7 (x) Row 4, Column 9 Row 4, Column 3 It's Blue. Row 4, Column 8 (s)
5: Compute the sample standard deviation  Row 4, Column 3 It's Blue. Row 4, Column 8 (s)


    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 4, Column 2 It's yellower than it looks here Row 3, Column 2 GSB = Gosub used in programming (S)
2: Enter Data  Row 7, Column 2 Row 3 and 4, Column 6 It's the long key in the middle. Row 7, Column 1 Row 4, Column 9 Row 6, Column 1 Row 3 and 4, Column 6 It's the long key in the middle. Row 7, Column 2 
 Row 4, Column 9 Row 6, Column 2 Row 3 and 4, Column 6 It's the long key in the middle. Row 7, Column 3 Row 4, Column 9 Row 5, Column 1 Row 3 and 4, Column 6 It's the long key in the middle. 
 Row 6, Column 1 Row 4, Column 9
3: Compute the slope of the regression line  Row 4, Column 2 It's yellower than it looks here Row 4, Column 9 (L.R.) Row 3, Column 4
4: Compute the y-intercept of the regression line  Row 4, Column 2 It's yellower than it looks here Row 4, Column 9 (L.R.) 
5: Compute the correlation  Row 4, Column 2 It's yellower than it looks here Row 4, Column 8 (y-hat, r) Row 3, Column 4


    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 7, Column 1 Row 8, Column 1 Row 3 and 4, Column 6 It's the long key in the middle. Row 6, Column 3 Row 4, Column 3 It's Blue. Row 4, Column 10
2: Compute 9P5  Row 5, Column 3 Row 3 and 4, Column 6 It's the long key in the middle. Row 6, Column 2 Row 4, Column 2 It's yellower than it looks here Row 4, Column 10


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

For more information, consult a manual.

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