The position of the graphically represented keys can be found by moving your mouse on top of the graphic.
The ON/C Key does not count as a row. Row 1 starts with the x! key.

 Turn your calculator on Press . (You should see the word ON to the right of the key.) Clearing the memory Press (CSR - Clear Statistical Register is written above the key.) Pressing and then has the same effect.

 Entering data one variable 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 The TI-30 STAT cannot do two variable statistics.

 Calculating one-variable statistics mean Press (x). standard deviation for populations (s or sn) Press (sn). standard deviation for samples (s or sn-1) Press (sn-1 ).

 Calculating two-variable statistics r (correlation) The TI-30 STAT cannot do correlations. regression coefficients slope The TI-30 STAT cannot do slopes of regression. y-intercept The TI-30 STAT cannot do y-intercepts of regression.

 Calculating combinations and permutations combinations (nCr) There is no direct way of doing combinations. However, nCr = . So enter n and press . Press . Enter r and press . Press . Subtract r from n and press  . Press . permutations (nPr) There is no direct way of doing combinations. However, nPr = n!/r!. So enter n and press . Press . Enter r and press . 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 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 (CSR) 2: Enter the data: 3: Compute the mean (x) 4: Compute the standard deviation (population): (sn) 5: Compute the standard deviation (sample): (sn-1 )

You should get a mean of 18, population standard deviation of 2.549509757, and a sample standard deviation of 2.943920289.

C: Find 10C6 and 9P5.
 1: Compute 10C6 2: Compute 9P5

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