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

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 SCL, for Statistics CLear, above the key.  Then press .

Entering data
	one variable
		Press  (to get into one-variable statistics mode).  Type in the first number.  Press (you should see DT below the key ( DT = DaTa).  The screen will say 1 because, so far, you have entered one data point.  Type in the second number.  Press .  The screen will say 2 because you have now entered two data points.  Continue until all the data has been entered.
	two variables
		Press  (to get into two-variable regression statistics mode).  Clear memory.  Type in the first x-value.  Press .  Type in the corresponding y-value.  Press . The screen will say 1 because , so far, you have entered one data point.   Type in the second x-value.  Press .  Type in the second y-value.  Press .  The screen will say 2 because now you have entered two data points.  Continue until all the data has been entered.

Calculating one-variable statistics You must press  to get into one-variable statistics mode.
	mean (x)
		Press .  You should see x above the key.  Press .
	standard deviation for populations (s or sn)
		Press .  You should see xsn above the key.  Press .
	standard deviation for samples (s or sn-1)
		Press .  You should see xsn-1 above the key.  Press .

Calculating two-variable statistics You must press   to get into regression mode.  Then enter the data and follow the directions below.
	r (correlation)
		Press .  You should see r above the key.  Press .
	regression coefficients
		slope
			Press .  You should see A above the key.  Press .
		y-intercept
			Press .  You should see B above the key.  Press .

Calculating combinations and permutations
	combinations (nCr)
		Enter the n value.  Press followed by the r value.  Press .
	permutations (nPr)
		Enter the n value.  Press .  You should see nPr above the key.  Enter the r value.  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 e^x as (e^x).

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 population standard deviation.	(xsn)
5: Compute the sample standard deviation:	(xsn-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.

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.

1: Compute 10C6
2: Compute 9P5	(nPr)

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

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