The HP12C Platinum has the same instructions.
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 a S on top.)

 Entering data one variable Enter the first number in the list. Press . Enter the second number in the list and press . Continue for all numbers in the list. two variables Enter the first y-value in the list and press . Enter the first x-value in the list and press . Type in each ordered pair in the same fashion - y-value first,, x-value last, .

 Calculating one-variable statistics mean (x) Press . (You should see x below the 0.) standard deviation for populations (s or sn) There's no direct key for s, but here's a fancy way around that. Press . standard deviation for samples (s or sn-1) Press . (You should see an s below the decimal point.)

 Calculating two-variable statistics For the regression coefficients, there are no direct commands. But there is a command to plug any number into the regression equation. The commands below take advantage of that to compute the slope and y-intercept. r (correlation) Press (you should see ,r under the 2) . regression coefficients slope Press you should see ,r under the 2. y-intercept Press .

 Calculating combinations and permutations Again, the HP 12C has no direct commands, but we can use the factorial button to compute nCr and nPr. combinations (nCr) Enter the n-value. Press . Enter the r-value. Press  . Enter the difference between n and r. Press  . permutations (nPr) Enter the n-value. Press . Enter the difference between n and r. 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 (S) 2: Enter Data 3: Compute the mean (x) 4: Compute the population standard deviation 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.

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 (S) 2: Enter Data 3: Compute the slope of the regression line 4: Compute the y-intercept of the regression line 5: Compute the correlation

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 (n!) (10 - 6 is 4) 2: Compute 9P5 (n!) (9 - 5 = 4)

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

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