The position of the graphically represented keys can be found by moving your mouse on top of the graphic. The function keys are not counted as a row.

Turn your calculator on

Press Row 5, Column 5. You should see ON to the right of the key.

Clearing the memory

Press Row 1 Column 4 Row 1 Column 1 Row 7, Column 1.  You will see choices on the bottom of the screen: The second key in the top row of function keys. (EDIT) The third in the top row of function keys. (ERS, for erase) The leftmost key in the top row of function keys. (Yes).  The manual also lists Row 5, Column 5 Row 1 Column 1 Row 7, Column 3 (Scl) Row 8, Column 5 Bottom Right Corner Row 1, Column 3 (short for Previous Menu) as a way to clear the statistical memory. 

Entering data

     one variable

To get into the SD mode, press Row 1 Column 4 Row 6, Column 4 Row 1 Column 4 Row 1 Column 1 Row 7, Column 2 (the last three keys in the sequence put you in non-store mode).  Enter a number, then Row 4, Column 6.  Enter the next number, then Row 4, Column 6, and so on until all the data has been entered. 

     two variables

To get into the REG mode, press Row 1 Column 4 Row 6, Column 1.  After you press MODE, the screen will show you a dozen choices. 4 is LIN, i.e. linear regression.  Enter the first x-value.  Press Row 1 Column 1 Row 4, Column 5 .  You should see a comma above the key.  Enter the corresponding y-value, then The leftmost key in the top row of function keys. (labeled DT).  Enter the other ordered pairs in the same way. 

Calculating one-variable statistics

     mean

Press The fourth key in the top row of function keys. (DEV) (x) Row 8, Column 5 Bottom Right Corner

     standard deviation for populations (s or sn)

Press The fourth key in the top row of function keys. (DEV) The second key in the top row of function keys. (xsn) Row 8, Column 5 Bottom Right Corner (If you have just calculated the mean, pressing F4 is unnecessary.)

     standard deviation for samples (s or sx)

Press The fourth key in the top row of function keys. (DEV) Third key in the top row of keys (x sn-1) Row 8, Column 5 Bottom Right Corner (If you have just calculated the mean, pressing F4 is unnecessary.)

Calculating two-variable statistics

     r (correlation coefficient)

Press (REG) Third key in the top row of keys (r) Row 8, Column 5 Bottom Right Corner (If you have just calculated the regression coefficients, pressing F6 is unnecessary.)

   regression coefficients

    slope

Press (REG)  The second key in the top row of function keys. (B) Row 8, Column 5 Bottom Right Corner (If you have just calculated the regression coefficients, pressing F6 is unnecessary.)

    y-intercept

Press (REG) (A) Row 8, Column 5 Bottom Right Corner (If you have just calculated the regression coefficients, pressing F6 is unnecessary.)

Computing the combinations and permutations

To do these you need to get out of the statistics mode.  Press Row 1 Column 4 Row 7, Column 4 to get into computational mode.

    combinations

Enter the n value.  Press Row 1 Column 1 Row 2 Column 2 (you should see MATH above the key) The second key in the top row of function keys. (PRB) Third key in the top row of keys (nCr).  Enter the r value and press Row 8, Column 5 Bottom Right Corner. 

    permutations

Enter the n value.  Press Row 1 Column 1 Row 2 Column 2 (you should see MATH above the key) The second key in the top row of function keys. (PRB) The second key in the top row of function keys. (nPr).  Enter the r value and press Row 8, Column 5 Bottom Right Corner.  

Turning the calculator off

Press Row 1 Column 1 Row 5, Column 5 (you should see OFF above the 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   Row 1 Column 4 Row 1 Column 1 Row 7, Column 1 The second key in the top row of function keys. (EDIT) The third in the top row of function keys. (ERS) The leftmost key in the top row of function keys. (Yes)
2: Enter Data  Row 1 Column 4 Row 6, Column 4 Row 1 Column 4 Row 1 Column 1 Row 7, Column 2 Row 7, Column 1 Row 6, Column 2 Row 4, Column 6 Row 7, Column 1 Row 6, Column 3  
  Row 4, Column 6 Row 7, Column 2 Row 8, Column 1 Row 4, Column 6 Row 7, Column 2 Row 7, Column 1 Row 4, Column 6
3: Compute the mean  The fourth key in the top row of function keys. (DEV) (x) Row 8, Column 5 Bottom Right Corner
4: Compute the population standard deviation  The fourth key in the top row of function keys. (DEV) The second key in the top row of function keys. (xsn) Row 8, Column 5 Bottom Right Corner  
5: Compute the sample standard deviation  The fourth key in the top row of function keys. (DEV) Third key in the top row of keys (x sn-1) Row 8, Column 5 Bottom Right Corner


    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 1 Column 4 Row 1 Column 1 Row 7, Column 1 The second key in the top row of function keys. (EDIT) The third in the top row of function keys. (ERS) The leftmost key in the top row of function keys. (Yes)
2: Enter Data  Row 1 Column 4 Row 6, Column 1 Row 7, Column 1 Row 1 Column 1 Row 4, Column 5 (x,y) Row 7, Column 2 The leftmost key in the top row of function keys. Row 7, Column 2 Row 1 Column 1         
  Row 4, Column 5 Row 6, Column 1 The leftmost key in the top row of function keys. Row 7, Column 3 Row 1 Column 1 Row 4, Column 5 Row 6, Column 2 The leftmost key in the top row of function keys. Row 6, Column 1 Row 1 Column 1  
  Row 4, Column 5 Row 5, Column 1 The leftmost key in the top row of function keys.
3: Compute the slope of the regression line   (REG)  The second key in the top row of function keys. (B) Row 8, Column 5 Bottom Right Corner  
4: Compute the y-intercept of the regression line   (REG) (A) Row 8, Column 5 Bottom Right Corner 
5: Compute the correlation   (REG) Third key in the top row of keys (r) Row 8, Column 5 Bottom Right Corner  


    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 1 Column 4 Row 7, Column 4 Row 7, Column 1 Row 8, Column 1 Row 1 Column 1 Row 2 Column 2 (MATH) The second key in the top row of function keys. (PRB) Third key in the top row of keys  
 (nCr) Row 6, Column 3 Row 8, Column 5 Bottom Right Corner
2: Compute 9P5  Row 1 Column 4 Row 7, Column 4 Row 5, Column 3 Row 1 Column 1 Row 2 Column 2 ( MATH) The second key in the top row of function keys. (PRB) The second key in the top row of function keys. (nPr) 
  Row 6, Column 2 Row 8, Column 5 Bottom Right Corner


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

For more information, consult a manual.

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