The position of the graphically represented keys can be found by moving your mouse on top of the graphic. 

Turn your calculator on
Press The On C Key: Row 1, Column 5.
Clearing the memory
Press The Second Key: Row 1, Column 1 The Equals Key: Row 9, Column 5 (you should see CSR, for Clear Statistical Registers, above the key).

 

Entering data
one variable
Enter the first number and press The Sigma Plus Key: Row 5, Column 1. Enter each of the remaining numbers, pressing The Sigma Plus Key: Row 5, Column 1 after each.
two variables
Enter the first x-value and press The X Swap Y Key: Row 5, Column 2. Enter the first y-value and press The Sigma Plus Key: Row 5, Column 1. Enter each of the other ordered pairs in this fashion: x-value, The X Swap Y Key: Row 5, Column 2, y-value, The Sigma Plus Key: Row 5, Column 1.

 

Calculating one-variable statistics
mean (x)
Press The Second Key: Row 1, Column 1 The STOre Key: Row 6, Column 1 (you will see the word Mean above the key).
standard deviation for populations (s or sn)
Press The Second Key: Row 1, Column 1 The E X C Key: Row 8, Column 1 (you will see sn above the key).
standard deviation for samples (s or sn-1)
Press The Second Key: Row 1, Column 1 The R C L Key: Row 7, Column 1  (you will see sn-1 above the key).

Calculating two-variable statistics
r (correlation)
Press The Second Key: Row 1, Column 1 The Divided By Key: Row 5, Column 5 (you will see the word Corr above the key).
regression coefficients
slope
Press The Second Key: Row 1, Column 1 The Times Key: Row 6, Column 5 The X Swap Y Key: Row 5, Column 2 (you will see b/a above the times key). a is the slope.
y-intercept
Press The Second Key: Row 1, Column 1 The Times Key: Row 6, Column 5 (you will see the word b/a above the key). b is the intercept.


Calculating combinations and permutations
combinations (nCr)
Enter n and r in the format n.rrr: That is, enter n followed by a decimal point (The decimal point key: Row 9, Column 3) followed by r as a three digit number (2 is 002, 10 is 010, etc.). Then press The Second Key: Row 1, Column 1 The Nine Key: Row 6, Column 4 (you should see nCr above the key).
permutations (nPr)
Enter n and r in the format n.rrr: That is, enter n followed by a decimal point (The decimal point key: Row 9, Column 3) followed by r as a three digit number (2 is 002, 10 is 010, etc.). Then press The Second Key: Row 1, Column 1 The Eight Key: Row 6, Column 3 (you should see nPr above the key).

 

Turning the calculator off
Press The Off Key: Row 1, Column 4.

 

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 Second Key: Row 1, Column 1 The Equals Key: Row 9, Column 5 (CSR)
2: Enter Data  The One Key: Row 8, Column 2 The Five Key: Row 7, Column 3 The Sigma Plus Key: Row 5, Column 1 The One Key: Row 8, Column 2 The Six Key: Row 7, Column 4 The Sigma Plus Key: Row 5, Column 1 The Two Key: Row 8, Column 3 The Zero Key: Row 9, Column 2 The Sigma Plus Key: Row 5, Column 1 The Two Key: Row 8, Column 3 The One Key: Row 8, Column 2 The Sigma Plus Key: Row 5, Column 1
3: Compute the mean  The Second Key: Row 1, Column 1 The STOre Key: Row 6, Column 1 (Mean)
4: Compute the population standard deviation   The Second Key: Row 1, Column 1 The E X C Key: Row 8, Column 1 (sn) 
5: Compute the sample standard deviation   The Second Key: Row 1, Column 1 The R C L Key: Row 7, Column 1  (sn-1)


    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 Second Key: Row 1, Column 1 The Equals Key: Row 9, Column 5 (CSR)
2: Enter Data  The One Key: Row 8, Column 2 The X Swap Y Key: Row 5, Column 2 The Two Key: Row 8, Column 3 The Sigma Plus Key: Row 5, Column 1 The Two Key: Row 8, Column 3 The X Swap Y Key: Row 5, Column 2 The Four Key: Row 7, Column 2 The Sigma Plus Key: Row 5, Column 1 The Three Key: Row 8, Column 4 The X Swap Y Key: Row 5, Column 2 The Five Key: Row 7, Column 3 The Sigma Plus Key: Row 5, Column 1 The Four Key: Row 7, Column 2 The X Swap Y Key: Row 5, Column 2 The Seven Key: Row 6, Column 2 The Sigma Plus Key: Row 5, Column 1
3: Compute the slope of the regression line   The Second Key: Row 1, Column 1 The Times Key: Row 6, Column 5 The X Swap Y Key: Row 5, Column 2 (b/a)
4: Compute the y-intercept of the regression line   The Second Key: Row 1, Column 1 The Times Key: Row 6, Column 5 (b/a)
5: Compute the correlation   The Second Key: Row 1, Column 1 The Divided By Key: Row 5, Column 5 (Corr)


    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 8, Column 2 The Zero Key: Row 9, Column 2 The decimal point key: Row 9, Column 3 The Zero Key: Row 9, Column 2 The Zero Key: Row 9, Column 2 The Six Key: Row 7, Column 4 The Second Key: Row 1, Column 1 The Nine Key: Row 6, Column 4 (nCr)
2: Compute 9P5  The Nine Key: Row 6, Column 4 The decimal point key: Row 9, Column 3 The Zero Key: Row 9, Column 2 The Zero Key: Row 9, Column 2 The Five Key: Row 7, Column 3 The Second Key: Row 1, Column 1 The Eight Key: Row 6, Column 3 (nCr)


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

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