The Sharp EL-531VBBL, the blue calculator should have the same keystrokes.
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: Triangular Button Upper Right.
Clearing the memory
Press The Second F Key: Triangular Button Upper Left The Delete Key: Row 1, Column 6. You should see CA above the key (for Clear All).

 

Entering data
one variable
Press The Second F Key: Triangular Key Upper Left The D R G Key: Row 2, Column 6, (you should see MODE above the DRG key). On the screen you will see MODE? 0-2 written on the screen. Press The One Key: Row 6, Column 1 for single variable. (The modes are explained on the top of the calculator in case you forget.) Enter a number, then Row 3, Column 6. Enter the next number, Row 3, Column 6, and so on.
two variables
Press The Second F Key: Triangular Key Upper Left Row 2, Column 6, (you should see MODE above the key). On the screen you will see MODE? 0-2 written on the screen. Press The Two Key: Row 6, Column 2 for regression mode. (The modes are explained on the top of the calculator in case you forget.) Enter the first x-value. Press Row 3, Column 5. You should see (x,y) below the key. On screen you will see your x-value followed by a comma. Enter the corresponding y-value then Row 3, Column 6. You should see n=1 on the screen, indicating that you have entered one ordered pair. Enter the other ordered pairs in the same way.

 

Calculating one-variable statistics
mean (x)
Press Row 3, Column 4 Row 5, Column 1. (You should see x in green above the key.)
standard deviation for populations (s or sn)
Press Row 3, Column 4 Row 5, Column 3. (You should see sx in green above the key.)
standard deviation for samples (s or sn-1)
Press Row 3, Column 4 Row 5, Column 2. (You should see sx in green above the key.)

Calculating two-variable statistics
r (correlation)
Press Row 3, Column 4 Row 5, Column 5. (You should see r in green above the key.)
regression coefficients
slope
Press Row 3, Column 4 Row 4, Column 5. (You should see b in green above the key.)
y-intercept
Press Row 3, Column 4 Row 4, Column 4. (You should see a in green above the key.)


Calculating combinations and permutations

To get out of STAT mode, press The Second F Key: Triangular Key Upper Left The D R G Key: Row 2, Column 6 The Zero Key: Row 7, Column 1.
combinations (nCr)
Enter the n value. Press The Second F Key: Triangular Key Upper Left Row 5, Column 2 (you should see nCr in yellow above the key). Enter the r value and press The Equals Key: Row 7, Columns 4 and 5.
permutations (nPr)
Enter the n value. Press The Second F Key: Triangular Key Upper Left Row 5, Column 3 (you should see nPr in yellow above the key). Enter the r value and press The Equals Key: Row 7, Columns 4 and 5.

 

Turning the calculator off
Press The Second F Key: Triangular Key Upper Left The On C Key: Triangular Key: Upper Right.

 

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 F Key: Triangular Key Upper Left Row 1, Column 6 (CA) 
2: Enter Data  The Second F Key: Triangular Key Upper Left Row 2, Column 6 (MODE) The One Key: Row 6, Column 1 Row 6, Column 1 Row 5, Column 2 Row 3, Column 6 Row 6, Column 1 Row 5, Column 3 Row 3, Column 6 Row 6, Column 2 Row 7, Column 1 Row 3, Column 6 Row 6, Column 2 Row 6, Column 1 Row 3, Column 6
3: Compute the mean  Row 3, Column 4 Row 5, Column 1 (x) 
4: Compute the population standard deviation  Row 3, Column 4 Row 5, Column 3 (sx) 
5: Compute the sample standard deviation  Row 3, Column 4 Row 5, Column 2 (sx) 


    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 F Key: Triangular Key Upper Left Row 1, Column 6 (CA) 
2: Enter Data  The Second F Key: Triangular Key Upper Left Row 2, Column 6 ( MODE) Row 6, Column 2 Row 6, Column 1 Row 3, Column 5 (x,y) Row 6, Column 2 Row 3, Column 6 Row 6, Column 2 Row 3, Column 5 Row 5, Column 1 Row 3, Column 6 Row 6, Column 3 Row 3, Column 5 Row 5, Column 2 Row 3, Column 6 Row 5, Column 1 Row 3, Column 5 Row 4, Column 1 Row 3, Column 6
3: Compute the slope of the regression line  Row 3, Column 4 Row 4, Column 5 (b) 
4: Compute the y-intercept of the regression line  Row 3, Column 4 Row 4, Column 4 (a) 
5: Compute the correlation  Row 3, Column 4 Row 5, Column 5 (r) 


    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 6, Column 1 Row 7, Column 1 The Second F Key: Triangular Key Upper Left Row 5, Column 2 (nCr) Row 5, Column 3 The Equals Key: Row 7, Columns 4 and 5
2: Compute 9P5  Row 4, Column 3 The Second F Key: Triangular Key Upper Left Row 5, Column 3 (nPr) Row 5, Column 2 The Equals Key: Row 7, Columns 4 and 5


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

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