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

Warning: On some old versions, the green key is actually orange. The commands are the same.

 Turn your calculator on Press (you should see ON written below the key). Clearing the memory To clear the statistical memory, press (you should see CLS above the key).  To clear all the memory, press (you should see CLEAR ALL above the key).

 Entering data one variable Enter the first number, then press .  Enter the second number, then press . Continue until all the data has been entered. two variables Enter the first x-value; press .  Enter the first y-value; press .  Enter the second x-value; press .  Enter the second y-value; press .  Continue until all the data has been entered.

 Calculating one-variable statistics mean (x) Press (you should see x, y above the key). standard deviation for populations (s or sn) Press (you should see sx, sy above the key). standard deviation for samples (s or sn-1) Press (you should see sx, sy above the key).

 Calculating two-variable statistics r (correlation) Press (you should see , r above the key).  The screen will show you . Press (you should see SWAP above the key).  Now the screen will show you r. regression coefficients slope Press (you are telling the calculator that you are interested in what happens at x=0; this will be important for the y intercept).  Press (you should see , m above the key).  The screen will show you (the predicted value for y if x=0).  Press (you should see SWAP above the key).  Now the screen will show you m, the slope. y-intercept Press (you are telling the calculator that you are interested in what happens at x=0; we need this to get the y intercept).  Press (you should see , m above the key).  The screen will show you .   Since this is the predicted value of y when x=0, it is also the y-intercept.

 Calculating combinations and permutations combinations (nCr) This calculator has no direct way to do combinations.  However, it has the factorial function, (has n! above it).  To compute nCr, compute n! / [r!(n-r)!]. permutations (nPr) This calculator has no direct way to do permutations.  However, it has the factorial function, (has n! above it).  To compute nPr, compute n! / r!

 Turning the calculator off Press (should say OFF above it).

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 (CLS) 2: Enter the data 3: Compute the mean (x, y) 4: Compute the population standard deviation. (sx, sy) 5: Compute the sample standard deviation: (sx, sy)

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 (CLS) 2: Enter Data 3: Compute the slope of the regression line (, m) (SWAP) 4: Compute the y-intercept of the regression line. (, m) 5: Compute the correlation. (, r) (SWAP)

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.