Before any statistical calculations, you must press for one-variable statistics mode or  for two-variable (linear regression) mode.

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

Press . (You should see the word ON to the right of the key.)

Clearing the memory

Press (you should see SCL, for Stat CLear, over the key) .

Entering data

one variable

Press  (to get into one-variable statistics mode).  Type in first number.  Press (you should see DT below the key, in blue).  Type in second number.  Press .  Continue until all the data has been entered.

two variables

Press    (to get into two-variable mode).   Clear memory.  Type in the first x-value, then  , then the corresponding y-value.  Press .  Continue in this manner until all the data has been entered.

Calculating one-variable statistics

To get into one-variable statistics mode, press  .

mean

Press (x.

standard deviation for populations (s or sn)

Press (x sn .

standard deviation for samples (s or sn-1)

Press (x sn-1 )  .

Calculating two-variable statistics

Press  to get into two-variable (linear regression mode).  Then enter the data and follow the directions below.

r (correlation)

Press (you should see r above the key), then .

regression coefficients

slope

Press (you should see A above the key), then .

y-intercept

Press (you should see B above the key), then .

Calculating combinations and permutations

combinations (nCr)

Enter the n value.  Press (you should see nCr above the key).  Enter the r value, then .

permutations (nPr)

Enter the n value.  Press (you should see nPr above the key).  Enter the r value, then .

Turning the calculator off

This is a solar calculator.  You can't turn it off.  EVER!  (Okay, it shuts down after two minutes of non-use).

Worked Out Examples

In the following examples, we list the exact key sequence used to find the answer.  We list the keys by the main symbol on the key.  In parentheses we include a helpful mnemonic, e.g. (ex).

A: What is the mean and standard deviation of the following list of numbers?

15      16      20      21

 1: Clear Memory (scl) 2: Enter the data: (DT) 3: Compute the mean (x) 4: Compute the standard deviation (population): (x sn) 5: Compute the standard deviation (sample): (x sn-1)

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 (scl) 2: Enter Data (DT) 3: Compute the slope of the regression line (a) 4: Compute the y-intercept of the regression line (b) 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.