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 Key: Row 10, Column 1.
Clearing the memory
To clear the entire memory, press The Stat Key: Row 3 , Column 3 Row 8 Column 2 (You can use the arrow keys to move down to 4 if you want.) You will see the word CLRLIST on the main screen. Now press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You should see L1 above the 1 key) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (You should see L2 above the 2 key) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 4 (You should see L3 above the 3 key) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 8 Column 2 (You should see L4 above the 4 key).  If you typically use only the first two columns then don't bother with L3 and L4.

 

Entering data
one variable
Press The Stat Key: Row 3 , Column 3 The One Key: Row 9, Column 2; you will see a table. Enter the first number, then press Row 10 Column 5 "Bottom Right Corner". Enter the second number, then press Row 10 Column 5 "Bottom Right Corner". Continue until you are finished with the list.
two variables
Press The Stat Key: Row 3 , Column 3 The One Key: Row 9, Column 2; you will see a table. Enter the first x-value, then press Row 10 Column 5 "Bottom Right Corner". Press , then enter the first y-value, then press Row 10 Column 5 "Bottom Right Corner". Enter each pair likewise until you are finished with the list.

 

Calculating one-variable statistics

Note: one procedure gives you all three one-variable statistics. If you want all three, you need only do the procedure once.
mean (x)
Press The Stat Key: Row 3 , Column 3 .  The word CALC should be highlighted.  Press (labeled 1:1-Var). The words 1-Var Stats will appear on the main screen. Press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You'll see L1 on the screen.) Bottom Right Corner   The mean is x.
standard deviation for populations (s or sn)
Press The Stat Key: Row 3 , Column 3 .  The word CALC should be highlighted.  Press The One Key: Row 9, Column 2 (labeled 1:1-Var). The words 1-Var Stats will appear on the main screen. Press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You'll see L1 on the screen.) Bottom Right Corner  The population standard deviation is sx.
standard deviation for samples (s or sn-1)
Press The Stat Key: Row 3 , Column 3 .  The word CALC should be highlighted.  Press The One Key: Row 9, Column 2 (labeled 1:1-Var). The words 1-Var Stats will appear on the main screen. Press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You'll see L1 on the screen.) Bottom Right Corner  The sample standard deviation is sx.

Calculating two-variable statistics
r (correlation)
Press The Stat Key: Row 3 , Column 3 .  The word CALC should be highlighted.  Row 9 Column 4 (labeled 3:LinReg(ax+b)). The words LinReg(ax+b) will appear on the main screen. Press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You'll see L1 on the screen.) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (You should see L2 on the screen) Bottom Right Corner.  The correlation coefficient is r.
regression coefficients
slope
Press The Stat Key: Row 3 , Column 3 .  The word CALC should be highlighted.  Row 9 Column 4 (labeled 3:LinReg(ax+b)). The words LinReg(ax+b) will appear on the main screen. Press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You'll see L1 on the screen.) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (You should see L2 on the screen) Bottom Right Corner. The slope is a.  [ You can also press Row 8 Column 3 (LinReg(a+bx)) in which case the slope would be b. ]
y-intercept
Press The Stat Key: Row 3 , Column 3 .  The word CALC should be highlighted.  Row 9 Column 4 (labeled 3:LinReg(ax+b)). The words LinReg(ax+b) will appear on the main screen. Press Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (You'll see L1 on the screen.) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (You should see L2 on the screen) Bottom Right Corner.  The y-intercept is b. [ You can also press Row 8 Column 3 (LinReg(a+bx)) in which case the y-intercept would be a. ]


Calculating combinations and permutations
combinations (nCr)
Enter the n value.  Press Row 4 Column 1.  On the top, you'll see three choices. Use to move the cursor to PROB, the third choice.  Press (labeled nCr).  Enter the r value, then press Bottom Right Corner.
permutations (nPr)
Enter the n value.  Press Row 4 Column 1.  On the top, you'll see three choices. Use to move the cursor to PROB, the third choice.  Press (labeled nPr).  Enter the r value, then press Bottom Right Corner.

 

Turning the calculator off
Press Row 1, Column 1 Bottom Left Corner (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  The Stat Key: Row 3 , Column 3 Row 8 Column 2 Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (L2) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 4 (L3) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 8 Column 2
2: Enter Data  The Stat Key: Row 3 , Column 3 The One Key: Row 9, Column 2 The One Key: Row 9, Column 2 Bottom Right Corner The One Key: Row 9, Column 2 Bottom Right Corner  Bottom Right Corner The One Key: Row 9, Column 2
3: Compute the mean  The Stat Key: Row 3 , Column 3 The One Key: Row 9, Column 2 (1:1-Var) Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Bottom Right Corner 
4: Compute the standard deviation (population)  The Stat Key: Row 3 , Column 3 The One Key: Row 9, Column 2 ( 1:1-Var) Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Bottom Right Corner 
5: Compute the standard deviation (sample)  The Stat Key: Row 3 , Column 3 The One Key: Row 9, Column 2 ( 1:1-Var) Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) 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  The Stat Key: Row 3 , Column 3 Row 8 Column 2 Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (L2) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 4 (L3) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 8 Column 2
2: Enter Data  Row 1, Column 1 Row 3, Column 2 The One Key: Row 9, Column 2 The One Key: Row 9, Column 2 Bottom Right Corner Bottom Right Corner Bottom Right Corner Bottom Right Corner Bottom Right Corner Bottom Right Corner Bottom Right Corner Bottom Right Corner
3: Compute the slope of the regression line  The Stat Key: Row 3 , Column 3 Row 9 Column 4 (3:LinReg(ax+b)) Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (L2) Bottom Right Corner.
4: Compute the y-intercept of the regression line  The Stat Key: Row 3 , Column 3 Row 9 Column 4 (3:LinReg(ax+b)) Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (L2) Bottom Right Corner
5: Compute the correlation  The Stat Key: Row 3 , Column 3 Row 9 Column 4 (3:LinReg(ax+b)) Row 2 Column 1 It's Yellow. The One Key: Row 9, Column 2 (L1) Row 6 Column 2 Row 2 Column 1 It's Yellow. Row 9 Column 3 (L2) 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  The One Key: Row 9, Column 2 Row 3, Column 1  (3: nCr) Bottom Right Corner
2: Compute 9P5   Row 3, Column 1 (2:nPr) Bottom Right Corner


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

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