The position of the graphically
represented keys can be found by moving your mouse on top of the graphic.
The round keys at the top are not counted as a row.
Turn your calculator on | |||||||||
Press . | |||||||||
Clearing the memory | |||||||||
Press You will be given three choices. Press (Scl=Stat Clear). |
Entering data | |||
one variable | |||
First, press (SD). Yes, the mode key is pressed twice. Now enter the first number in your list and press . Enter the other numbers, pressing after each. | |||
two variables | |||
First, press (REG) (Lin). Yes, the mode key is pressed twice. To enter the first ordered pair, enter the first x-value, press , enter the first y-value and press . Enter the other ordered pairs in the same fashion, pressing after each. |
Calculating one-variable statistics | ||||
mean (x) | ||||
Press . (You should see S-VAR in blue brackets above the key.) You'll see three choices on the screen, press (x). Press to see the answer. | ||||
standard deviation for populations (s or s_{n}) | ||||
Press . (You should see S-VAR in blue brackets above the key.) You'll see three choices on the screen, press (xsn). Press to see the answer. | ||||
standard deviation for samples (s or s_{n-1}) | ||||
Press . (You should see S-VAR in blue brackets above the key.) You'll see three choices on the screen, press (xsn-1). Press to see the answer. |
Calculating two-variable statistics |
|||||
r (correlation) | |||||
Press . (You should see S-VAR in blue brackets above the key.) Press . You'll see three choices on the screen, press (r). Press to see the answer. | |||||
regression coefficients | |||||
slope | |||||
Press . (You should see S-VAR in blue brackets above the key.) Press . You'll see three choices on the screen, press (B). Press to see the answer. | |||||
y-intercept | |||||
Press . (You should see S-VAR in blue brackets above the key.) Press . You'll see three choices on the screen, press (A). Press to see the answer. |
Calculating combinations and permutations | ||||
combinations (nCr) | ||||
Enter the n value. Press (nCr is above the key). Enter the r value and press . | ||||
permutations (nPr) | ||||
Enter the n value. Press (nPr is above the key). Enter the r value and press . |
Turning the calculator off | ||
Press (It says OFF on top of the key.) |
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 Data | (SD) |
3: Compute the mean | (S-VAR) (x) |
4: Compute the population standard deviation | (S-VAR) (xsn) |
5: Compute the sample standard deviation | (S-VAR) (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.
x | 1 | 2 | 3 | 4 |
y | 2 | 4 | 5 | 7 |
1: Clear Memory | (Scl) |
2: Enter Data | (REG) (Lin) |
3: Compute the slope of the regression line | (S-VAR) (B) |
4: Compute the y-intercept of the regression line | (S-VAR) (A) |
5: Compute the correlation | (S-VAR) (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 _{10}C_{6} |
(nCr) |
2: Compute _{9}P_{5} | (nCr) |
You should get _{10}C_{6 }= 210 and _{9}P_{5}=
15120.
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