Texas Instruments TI-82 STATS

2.20 Math, Angle, and Test Operations
82STAT~4.DOC TI-83 international English Bob Fedorisko Revised: 10/28/05 12:19 PM Printed: 10/28/05 12:20
PM Page 20 of 26
82STAT~4.DOC TI-83 international English Bob Fedorisko Revised: 10/28/05 12:19 PM Printed: 10/28/05 12:20
PM Page 20 of 26
To display the MATH PRB menu, press  |.
MATH NUM CPXPRB
1: rand Random-number generator
2: nPr
N
umber of permutations
3: nCr
N
umber of combinations
4: ! Factorial
5: randInt( Random-integer generator
6: randNorm( Random # from Normal distribution
7: randBin( Random # from Binomial distribution
rand (random number) generates and returns one or more
random numbers > 0 and < 1. To generate a list of random-
numbers, specify an integer > 1 for numtrials (number of trials).
The default for numtrials is 1.
rand[(numtrials)]
Tip: To generate random numbers beyond the range of 0 to 1, you
can include rand in an expression. For example, randä
ää
ä5 generates a
random number > 0 and < 5.
With each rand execution, the TI-82 STATS generates the same
random-number sequence for a given seed value. The
TI-82 STATS factory-set seed value for
rand is 0. To generate a
different random-number sequence, store any nonzero seed
value to
rand. To restore the factory-set seed value, store 0 to
rand or reset the defaults (Chapter 18).
Note: The seed value also affects randInt(, randNorm(, and
randBin( instructions (page 2.22).
MATH PRB (Probability) Operations
MATH PRB Menu
rand