The position of the graphically represented keys can be found by moving your mouse on top of the graphic. 
The SC-10 has some slanted keys and triangular keys on the top. These do not count as a row. The SC-10 also has a side flap with additional keys. Some explanations of statistical keys can be found by moving the side switch to its highest position.
Turn your calculator on
Press The ON Key: orange slanted key on the top.
Clearing the memory
Select the mode you want: The Mode Key: fourth key on the row of irregular keys. It's slanted and has MODE above it. The One Key: Row 6, Column 2 for basic statistics and The Mode Key: fourth key on the row of irregular keys. It's slanted and has MODE above it. The Two Key: Row 6, Column 3 for linear regression. Then press The Second Key: rightmost key on the row of irregular keys. It's triangular and says 2ND above it. The E X C Key: Row 6, Column 1 (you should see CSR, for Clear Statistical Registers, above the key).

 

Entering data
one variable
Clear the memory as described above. Enter each number in the list and press The Sigma Plus Key: Side Flap: Row 3, Column 1 after it.
two variables
Press The Mode Key: fourth key on the row of irregular keys. It's slanted and has MODE above it. The Two Key: Row 6, Column 3 to get into linear regression mode. Enter the first x value and press The a key: Row 2, Column 3. Enter the first y value and press The b key: Row 2, Column 4. Finish by pressing The Sigma Plus Key: Side Flap: Row 3, Column 1. Enter the remaining pairs in this fashion: x-value, The a key: Row 2, Column 3, y-value, The b key: Row 2, Column 4, The Sigma Plus Key: Side Flap: Row 3, Column 1.

 

Calculating one-variable statistics
mean (x)
Press The x bar key: Side Flap: Row 3, Column 2.
standard deviation for populations (s or sn)
Press The Sigma X N Key: Side Flap: Row 3, Column 3.
standard deviation for samples (s or sn-1)
Press The Sigma X N Minus One Key: Side Flap: Row 3, Column 4.

Calculating two-variable statistics
r (correlation)
Press The Correlation Key: Side Flap: Row 7, Column 4.
regression coefficients
slope
Press The Slope Key: Side Flap: Row 6, Column 1.
y-intercept
Press The Intercept Key: Side Flap: Row 7, Column 1.


Calculating combinations and permutations

Before you do combinations and permutations, press AC MODE DEC to get back to normal calculations mode.
combinations (nCr)
Enter n, then press The a key: Row 2, Column 3. Enter r and press The b key: Row 2, Column 4. Then press The n C r Key: Side Flap: Row 7, Column 5 .
permutations (nPr)
Enter n, then press The a key: Row 2, Column 3. Enter r and press The b key: Row 2, Column 4. Then press The n P r Key: Side Flap: Row 6, Column 5 .

 

Turning the calculator off
Press The Off Key: The triangular key to the right of the ON 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   The Mode Key: fourth key on the row of irregular keys. It's slanted and has MODE above it. The One Key: Row 6, Column 2 (STAT 1) The Second Key: rightmost key on the row of irregular keys. It's triangular and says 2ND above it. The E X C Key: Row 6, Column 1 (CSR)
2: Enter Data  The One Key: Row 6, Column 2 The Five Key: Row 5, Column 3 The Sigma Plus Key: Side Flap: Row 3, Column 1 The One Key: Row 6, Column 2 The Six Key: Row 5, Column 4 The Sigma Plus Key: Side Flap: Row 3, Column 1 The Two Key: Row 6, Column 3 The Zero Key: Row 7, Column 2 The Sigma Plus Key: Side Flap: Row 3, Column 1 The Two Key: Row 6, Column 3 The One Key: Row 6, Column 2 The Sigma Plus Key: Side Flap: Row 3, Column 1  
3: Compute the mean  The x bar key: Side Flap: Row 3, Column 2
4: Compute the population standard deviation  The Sigma X N Key: Side Flap: Row 3, Column 3
5: Compute the sample standard deviation  The Sigma X N Minus One Key: Side Flap: Row 3, 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  The Mode Key: fourth key on the row of irregular keys. It's slanted and has MODE above it. The Two Key: Row 6, Column 3 (STAT 2) The Second Key: rightmost key on the row of irregular keys. It's triangular and says 2ND above it. The E X C Key: Row 6, Column 1 (CSR)
2: Enter Data  The One Key: Row 6, Column 2 The a key: Row 2, Column 3 The Two Key: Row 6, Column 3 The b key: Row 2, Column 4 The Sigma Plus Key: Side Flap: Row 3, Column 1 The Two Key: Row 6, Column 3 The a key: Row 2, Column 3 The Four Key: Row 5, Column 2 The b key: Row 2, Column 4 The Sigma Plus Key: Side Flap: Row 3, Column 1 The Three Key: Row 6, Column 4 The a key: Row 2, Column 3 The Five Key: Row 5, Column 3 The b key: Row 2, Column 4 The Sigma Plus Key: Side Flap: Row 3, Column 1 The Four Key: Row 5, Column 2 The a key: Row 2, Column 3 The Seven Key: Row 4, Column 2 The b key: Row 2, Column 4 The Sigma Plus Key: Side Flap: Row 3, Column 1  
3: Compute the slope of the regression line  The Slope Key: Side Flap: Row 6, Column 1
4: Compute the y-intercept of the regression line  The Intercept Key: Side Flap: Row 7, Column 1
5: Compute the correlation  The Correlation Key: Side Flap: Row 7, 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

 The One Key: Row 6, Column 2 The Zero Key: Row 7, Column 2 The a key: Row 2, Column 3 The Six Key: Row 5, Column 4 The b key: Row 2, Column 4 The n C r Key: Side Flap: Row 7, Column 5

2: Compute 9P5  The Nine Key: Row 4, Column 4 The a key: Row 2, Column 3 The Five Key: Row 5, Column 3 The b key: Row 2, Column 4 The n P r Key: Side Flap: Row 6, Column 5


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

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