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G. 7:Probability
Press   . Use 
and  to select the menu of choice. |
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Not all options are given in the entry format. Options that are used frequently will be included, but others are omitted from the table. For a complete format listing, you can check the TI-89 manual. Results in complex mode are not covered. They can be found in the manual.
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Operation |
Entry Format |
Explanation |
Screen |
| 1:! | expression1! | Returns the
factorial of the argument. The values must be non-negative whole numbers. |
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| 2:nPr | NPR(expression1,expression2) | NPR( ) is the number of permutations of expression1 things taken expression2 at a time. |
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| 3:nCr | NCR(expression1,expression2) | NCR( ) is the number of combinations of expression1 things taken expression2 at a time. |
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| 4:rand | rand([n]) | n is an integer, but
not 0. If n is omitted, the next random number between 0 and 1 in the sequence is returned. |
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| 5:randNorm | randNorm(mean,sd) | Returns a decimal
number from the normal distribution. |
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| 6:RandSeed | RandSeed number | If
number=0, sets the seeds to the factory defaults for the random number generator. If the number is not 0, then two seeds are generated and stored in system variables seed1 and seed2. |
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| 7:randMat | randMat(numRows,numColumns) | Returns a matrix of
integers between -9 and 9 of the specified dimension. |
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| 8:randPoly | randPoly(var,order) | Returns a polynomial
in var of the specified order. The coefficients are random integers in the range -9 to 9. The leading coefficient will not be 0. |
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