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 CA above the key (for Clear All).

 Entering data one variable Press  , (you should see MODE above the key). On the screen you will see MODE? 0-2 written on the screen. Press  for single variable. (The modes are explained on the top of the calculator in case you forget.) Enter a number, then . Enter the next number, , and so on. two variables Press  , (you should see MODE above the key). On the screen you will see MODE? 0-2 written on the screen. Press  for regression mode, what it calls STATxy. (The modes are explained on the top of the calculator in case you forget.) Enter the first x-value. Press . You should see (x,y) below the key. On screen you will see your x-value followed by a comma. Enter the corresponding y-value then . You should see n=1 on the screen, indicating that you have entered one ordered pair. Enter the other ordered pairs in the same way.

 Calculating one-variable statistics mean (x) Press  . (You should see x in green above the key.) standard deviation for populations (s or sn) Press  . (You should see sx in green above the key.) standard deviation for samples (s or sn-1) Press  . (You should see sx in green above the key.)

 Calculating two-variable statistics r (correlation) Press  . (You should see r in green above the key.) regression coefficients slope Press  . (You should see b in green above the key.) y-intercept Press  . (You should see a in green above the key.)

 Calculating combinations and permutations combinations (nCr) Enter the n value. Press  (you should see nCr in yellow above the key). Enter the r value and press . permutations (nPr) Enter the n value. Press  (you should see nPr in yellow above the key). Enter the r value and press .

 Turning the calculator off Press  .

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 (CA) 2: Enter Data (MODE) 3: Compute the mean (x) 4: Compute the population standard deviation (sx) 5: Compute the sample standard deviation (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 (CA) 2: Enter Data ( MODE)  (x,y) 3: Compute the slope of the regression line (b) 4: Compute the y-intercept of the regression line (a) 5: Compute the correlation (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 (nCr) 2: Compute 9P5 (nPr)

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