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

 Turn your calculator on Press . Clearing the memory Press .  You should see S above the key. (i.e. clear the sum registers.)

 Entering data one variable Enter the first value.  Press .  (You will see a 1 on the screen because you have entered one data point.)  Enter the next value.  Press .  (You will see a 2 on the screen because you have entered two data points.) Continue until all the data has been entered. two variables Enter the first y-value.  Press .  Enter the corresponding x-value then .  Notice that this is the reverse of the usual order.  Welcome to Reverse Polish Notation.  Enter the other ordered pairs in the same way:  y-value first.

 Calculating one-variable statistics mean (x) Press .  (You should see x in blue on the bottom of the key.) standard deviation for populations (s or sn) Enter the mean.  Press .  Press .  (You should see s in blue on the bottom of the key.) standard deviation for samples (s or sn-1) Press .  (You should see s in blue on the bottom of the key.)

 Calculating two-variable statistics r (correlation) Press .  (You should see y-hat, r in yellow above the key.)  The number on the screen is y-hat.  Press . The correlation will appear on the screen. regression coefficients slope Press .  (You should see L.R. in yellow above the key.  L.R. stands for linear regression.)  The number on the screen is the y-intercept.  Press .  The slope will appear on the screen. y-intercept Press .  (You should see L.R. in yellow above the key.  L.R. stands for linear regression.)  The number on the screen is the y-intercept.

 Calculating combinations and permutations combinations (nCr) Enter the n value.  Press .  Enter the r value.  Press .  (You should see C y,x in blue on the bottom of the key.) permutations (nPr) Enter the n value.  Press .  Enter the r value.  Press .  (You should see P y,x in yellow above the key.)

 Turning the calculator off Press .  If it's on, it will turn off.  So don't use it to clear the screen.

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 (S) 2: Enter Data 3: Compute the mean (x) 4: Compute the population standard deviation (x) (s) 5: Compute the sample standard deviation (s)

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 (S) 2: Enter Data 3: Compute the slope of the regression line (L.R.) 4: Compute the y-intercept of the regression line (L.R.) 5: Compute the correlation (y-hat, 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 2: Compute 9P5

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