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Press the STAT key.
Press the number 1 key.
Enter the x values into L1.
Enter the P(x) probabilities into L2.
Press the STAT key.
Press the ► key to highlight CALC.
Press the number 1 key
When 1-Var Stats appears on the calculator screen, type in L1, L2 to get 1-Var Stats L1, L2.
After you press the ENTER key you will get the descriptive statistics which includes the
population mean and standard deviation.
Generating Dependent Probabilities
Factorials
A common function needed to compute dependent probabilities is factorial. The factorial of n is
usually written as n! and that is how you type it on the calculator. The “!” is found on the
MATH page under the PRB list.
Lets say that you wanted to find the number of ways six people could be arranged in six
different chairs. You could solve this by finding six factorial (6!).
Type in the number 6.
Press the MATH key.
Press the ► to highlight PRB.
Press the number 4 key.
Press the ENTER key to get the value 720.
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