The position of the graphically represented keys can be found by moving your mouse on top of the graphic.  The round button scattered about the top of the calculator do not constitute a row. Row 1 begins with the SAVE button.

Turn your calculator on
Press The On Key: The round red key at the top.
Clearing the memory
Press The Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (You should now see STAT at the top of the screen.) You will see a menu of choices. Press The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. so that D-CL is underlined. (D-CL stands for Data CLear.) Press The Enter Key: Row 8, Column 5 Also the Equals Key to accept it.

 

Entering data
one variable
Press The Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (Stat) You will see a menu of choices. 1-var is underlined. Press The Enter Key: Row 8, Column 5 Also the Equals Key to accept it. You will see another menu; DATA INPUT is underlined. Press The Enter Key: Row 8, Column 5 Also the Equals Key to accept it. Enter each number in your list followed by The Down Arrow Key: The lower button on the big grey circle The Down Arrow Key: The lower button on the big grey circle (the second arrow is for frequency, you enter 4 if that number is in the list 4 times). 
two variables
Press The Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (Stat) You will see a menu of choices. 1-var is underlined. Press The Right Arrow Key: right side of the big grey circle of buttons. to move the underline to 2-var. Press The Enter Key: Row 8, Column 5 Also the Equals Key to accept it. You will see another menu; DATA INPUT is underlined. Press The Enter Key: Row 8, Column 5 Also the Equals Key to accept it. Enter the first x-value in your list. Press The Down Arrow Key: The lower button on the big grey circle and enter the first y-value in your list. Press The Down Arrow Key: The lower button on the big grey circle and continue in this fashion for the rest of the ordered pairs.

 

Calculating one-variable statistics
mean (x)
Press The Stat Var Key: Row 2, Column 2. You will see a menu. Press The Right Arrow Key: right side of the big grey circle of buttons. as many times as you need to reach x. It should be the second choice listed.
standard deviation for populations (s or sn)
Press The Stat Var Key: Row 2, Column 2. You will see a menu. Press The Right Arrow Key: right side of the big grey circle of buttons. as many times as you need to reach sx. It should be the sixth choice listed.
standard deviation for samples (s or sn-1)
Press The Stat Var Key: Row 2, Column 2. You will see a menu. Press The Right Arrow Key: right side of the big grey circle of buttons. as many times as you need to reach sx. It should be the fifth choice listed.

Calculating two-variable statistics
r (correlation)
Press The Stat Var Key: Row 2, Column 2. You will see a menu. Press The Right Arrow Key: right side of the big grey circle of buttons. as many times as you need to reach r. (Actually, pressing The Left Arrow Key: the left spot on the big grey circle of buttons may be quicker.)
regression coefficients
slope
Press The Stat Var Key: Row 2, Column 2. You will see a menu. Press The Right Arrow Key: right side of the big grey circle of buttons. as many times as you need to reach b. (Actually, pressing The Left Arrow Key: the left spot on the big grey circle of buttons may be quicker.)
y-intercept
Press The Stat Var Key: Row 2, Column 2. You will see a menu. Press The Right Arrow Key: right side of the big grey circle of buttons. as many times as you need to reach a. (Actually, pressing The Left Arrow Key: the left spot on the big grey circle of buttons may be quicker.)


Calculating combinations and permutations
combinations (nCr)
Enter the n-value. Press The P R B Key: Row 2, Column 4 The Right Arrow Key: right side of the big grey circle of buttons. (nCr should be underlined) The Enter Key: Row 8, Column 5 Also the Equals Key. Enter the r-value and press The Enter Key: Row 8, Column 5 Also the Equals Key for the result.
permutations (nPr)
Enter the n-value. Press The P R B Key: Row 2, Column 4 (nPr should be underlined) The Enter Key: Row 8, Column 5 Also the Equals Key. Enter the r-value and press The Enter Key: Row 8, Column 5 Also the Equals Key for the result.

 

Turning the calculator off
Press The Second Key: The round orange key at the top. The On Key: The round red key at the top.

 

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 Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (Stat) The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. (D-CL) The Enter Key: Row 8, Column 5 Also the Equals Key
2: Enter Data  The Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (Stat) The Enter Key: Row 8, Column 5 Also the Equals Key  (1-var) The Enter Key: Row 8, Column 5 Also the Equals Key (DATA INPUT) The Enter Key: Row 8, Column 5 Also the Equals Key The One Key: Row 7, Column 1 The Five Key: Row 6, Column 2 The Down Arrow Key: The lower button on the big grey circle The Down Arrow Key: The lower button on the big grey circle The One Key: Row 7, Column 1 The Six Key: Row 6, Column 3 The Down Arrow Key: The lower button on the big grey circle The Down Arrow Key: The lower button on the big grey circle The Two Key: Row 7, Column 2 The Zero Key: Row 8, Column 1 The Down Arrow Key: The lower button on the big grey circle The Down Arrow Key: The lower button on the big grey circle The Two Key: Row 7, Column 2 The One Key: Row 7, Column 1 The Down Arrow Key: The lower button on the big grey circle The Down Arrow Key: The lower button on the big grey circle 
3: Compute the mean  The Stat Var Key: Row 2, Column 2 The Right Arrow Key: right side of the big grey circle of buttons. (x)
4: Compute the population standard deviation  The Stat Var Key: Row 2, Column 2 The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. (sx)
5: Compute the sample standard deviation  The Stat Var Key: Row 2, Column 2 The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. (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 Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (Stat) The Right Arrow Key: right side of the big grey circle of buttons. The Right Arrow Key: right side of the big grey circle of buttons. (D-CL) The Enter Key: Row 8, Column 5 Also the Equals Key
2: Enter Data   The Mode Key: Blue Button at the top left The One Key: Row 7, Column 1 (Stat) The Right Arrow Key: right side of the big grey circle of buttons. The Enter Key: Row 8, Column 5 Also the Equals Key (2-var) The Enter Key: Row 8, Column 5 Also the Equals Key ( DATA INPUT) The Enter Key: Row 8, Column 5 Also the Equals Key The One Key: Row 7, Column 1 The Down Arrow Key: The lower button on the big grey circle The Two Key: Row 7, Column 2  The Down Arrow Key: The lower button on the big grey circle The Two Key: Row 7, Column 2 The Down Arrow Key: The lower button on the big grey circle The Four Key: Row 6, Column 1 The Down Arrow Key: The lower button on the big grey circle  The Three Key: Row 7, Column 3 The Down Arrow Key: The lower button on the big grey circle The Five Key: Row 6, Column 2 The Down Arrow Key: The lower button on the big grey circle The Four Key: Row 6, Column 1 The Down Arrow Key: The lower button on the big grey circle The Seven Key: Row 5, Column 1 The Down Arrow Key: The lower button on the big grey circle  
3: Compute the slope of the regression line  The Stat Var Key: Row 2, Column 2 The Right Arrow Key: right side of the big grey circle of buttons. (until b)
4: Compute the y-intercept of the regression line  The Stat Var Key: Row 2, Column 2 The Right Arrow Key: right side of the big grey circle of buttons. (until a)
5: Compute the correlation  The Stat Var Key: Row 2, Column 2 The Right Arrow Key: right side of the big grey circle of buttons. (until 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

 The One Key: Row 7, Column 1 The Zero Key: Row 8, Column 1 The P R B Key: Row 2, Column 4 The Right Arrow Key: right side of the big grey circle of buttons. (nCr) The Enter Key: Row 8, Column 5 Also the Equals Key The Six Key: Row 6, Column 3 The Enter Key: Row 8, Column 5 Also the Equals Key
2: Compute 9P5  The Nine Key: Row 5, Column 3 The P R B Key: Row 2, Column 4 (nPr) The Enter Key: Row 8, Column 5 Also the Equals Key The Five Key: Row 6, Column 2 The Enter Key: Row 8, Column 5 Also the Equals Key


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

Go to: 

Citizen's online manual sample problem set home page