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

When counting rows, do not count the row of function keys on top.

Turning the calculator on

Press Row 5, Column 5.

Clearing the memory

Enter Row 1, Column 4 and arrow to the STAT block (second from left on top row).  Press Row 8, Column 5 (short for execute).  You'll see some options on the bottom of the screen.  Press The righmost key on the topmost row of keys. to see more options.  Press Second key in the topmost row (DEL·A, for delete all).

Entering data

Before typing in any data, get into stat mode by pressing Row 1, Column 4 and using the arrow keys to get to the STAT block (second from left on top row).  Press Row 8, Column 5 (short for execute).  You will see four empty lists.  Use list one for the one variable mode and lists one and two for the regression problems.

     one variable

Enter the first element, press Row 8, Column 5.  Enter the second element, press Row 8, Column 5. Continue until all the data has been entered.

     two variables

Enter the first  x-value and press Row 8, Column 5.  Enter the second x-value and press Row 8, Column 5. Continue until all the x values have been entered.  Press .  Enter the first  y-value (make sure it lines up with the corresponding x value) and press Row 8, Column 5.  Enter the second y-value and press Row 8, Column 5.  Continue until all of the y values have been entered.

Calculating one-variable statistics

If you just finished entering the data, then you're ready to begin.  If not, get into stat mode by pressing Row 1, Column 4 and using the arrow keys to get to the STAT block (second from left on top row). Press Row 8, Column 5 (short for execute).

     mean

Press Second key in the topmost row (CALC) The leftmost key in the topmost row of keys. (1VAR).  You will see a screen with several values.  The mean is the first, labeled x.

     standard deviation for populations (s or sn)

Press Second key in the topmost row (CALC) The leftmost key in the topmost row of keys. (1VAR).  You will see a screen with several values.  The population standard deviation is the fourth, labeled xsn.

     standard deviation for samples (s or sn-1)

Press Second key in the topmost row (CALC) The leftmost key in the topmost row of keys. (1VAR).  You will see a screen with several values.  The sample standard deviation is the fifth, labeled xsn-1.  You will need to press Upper right corner. to see it on the screen. 

Calculating two-variable statistics

Make sure you are in the initial stat mode when you do these.  Get into stat mode by pressing Row 1, Column 4 and using the arrow keys to get to the STAT block (second from left on top row).  Press Row 8, Column 5 (short for execute).

     r (correlation coefficient)

Press Second key in the topmost row (CALC) Third key in the topmost row of keys (REG) The leftmost key in the topmost row of keys. (X, meaning linear regression). You will see a screen with several values.  The correlation is the third, labeled r.

     regression coefficients

    slope

Press Second key in the topmost row (CALC) Third key in the topmost row of keys (REG) The leftmost key in the topmost row of keys. (X, meaning linear regression).  You will see a screen with several values.  The slope is the first, labeled a.

    y-intercept

Press Second key in the topmost row (CALC) Third key in the topmost row of keys (REG) The leftmost key in the topmost row of keys. (X, meaning linear regression).  You will see a screen with several values.  The y-intercept is the second, labeled b.

Calculating combinations and permutations

You must be in the run mode for this to work.  If you're not, press Row 1, Column 4, then arrow to the RUN rectangle (upper left).  Press Row 8, Column 5 (EXE is short for EXEcute).

    combinations (nCr)

Enter the n value.  Press Row 1, Column 2 The righmost key on the topmost row of keys..  You will see choices on the bottom of the screen.  Press Third key in the topmost row (PROBability) Third key in the topmost row (nCr).  Finally, enter the r value and  Row 8, Column 5.

    permutations (nPr)

Enter the n value.  Press Row 1, Column 2 The righmost key on the topmost row of keys..  You will see choices on the bottom of the screen.  Press Third key in the topmost row (PROBability) The second key in the topmost row of keys. (nPr).  Finally, enter the r value and  Row 8, Column 5.

Turning the calculator off

Press Row 1, Column 1 Row 5, Column 5. (You should see OFF above the AC/ON key.)

 

Worked Out Examples

In the following examples, we list the exact key sequence used to find the answer.  We list the keys by the main symbol on the key.  In parentheses we include a helpful mnemonic, e.g. (ex).

Each of these directions assumes you are already in stat mode, except for C, which assumes you are in run mode.
A: What is the mean and standard deviation of the following list of numbers?

15      16      20      21

1: Clear Memory  The righmost key on the topmost row of keys. Second key in the topmost row (DEL·A)
2: Enter the data:   Row 7, Column 1 Row 6, Column 2 Row 8, Column 5 Row 7, Column 1 Row 6, Column 3 Row 8, Column 5 Row 7, Column 2 Row 8, Column 1 Row 8, Column 5 Row 7, Column 2  
  Row 7, Column 1 Row 8, Column 5
3: Compute the mean  Second key in the topmost row (CALC) The leftmost key in the topmost row of keys. (1VAR) 
4: Compute the standard deviation (population):  Second key in the topmost row (CALC) The leftmost key in the topmost row of keys. (1VAR) 
5: Compute the standard deviation (sample):  Second key in the topmost row (CALC) The leftmost key in the topmost row of keys. (1VAR)


    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 righmost key on the topmost row of keys. Second key in the topmost row (DEL·A)
2: Enter Data  Row 7, Column 1 Row 8, Column 5 Row 7, Column 2 Row 8, Column 5 Row 7, Column 3 Row 8, Column 5 Row 6, Column 1 Row 8, Column 5 Row 7, Column 2  
 Row 8, Column 5 Row 6, Column 1 Row 8, Column 5 Row 6, Column 2 Row 8, Column 5 Row 5, Column 1 Row 8, Column 5
3: Compute the slope of the regression line  Second key in the topmost row (CALC) Third key in the topmost row of keys (REG) The leftmost key in the topmost row of keys. (X) 
4: Compute the y-intercept of the regression line  Second key in the topmost row (CALC) Third key in the topmost row of keys (REG) The leftmost key in the topmost row of keys. (X) 
5: Compute the correlation  Second key in the topmost row (CALC) Third key in the topmost row of keys (REG) The leftmost key in the topmost row of keys. (X) 


    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 1, Column 2 The righmost key on the topmost row of keys. Third key in the topmost row (PROB) Third key in the topmost row (nCr) Row 6, Column 3 Row 8, Column 5
2: Compute 9P5  Row 5, Column 3 Row 1, Column 2 The righmost key on the topmost row of keys. Third key in the topmost row (PROB) Second key in the topmost row (nPr) Row 6, Column 2 Row 8, Column 5


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

For more information, consult the manual.

Click here for the sample problem set.

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