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 to get into the stat mode.  Then press (you should see scl above the key).

 Entering data one variable Type in first value, then press .  Type in second value, press .  Repeat until all the data has been entered. two variables The Casio fx-260 Solar does not do two variable statistics.

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

 Calculating two-variable statistics r (correlation) The Casio fx-260 Solar does not do regression. regression coefficients slope The Casio fx-260 Solar does not do regression. y-intercept The Casio fx-260 Solar does not do regression.

 Calculating combinations and permutations combinations (nCr) Enter the n value.  Press (you should see nCr above the 2 key).  Enter the r value.  Press . permutations (nPr) Enter the n value. Press (you should see nPr above the 1 key) followed by the r value. Press .

 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 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 2: Enter the data 3: Compute the mean (x) 4: Compute the population standard deviation. (sn) 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.

C: Find 10C6 and 9P5.
 1: Compute 10C6 (nCr) 2: Compute 9P5 (nPr)

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

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