HP 48g Graphing Calculator - Manual (Page 146)

Probability and Test Statistics
Use the commands in the PROB (probability) menu (pvffFT) (TtorT)
F-'ROB ) to calculate combinations, permutations, factorials, random
numbers, and upper-tail probabilities of various test statistics.
Probability Commands
Key Programmable
Command
Description
(MTHHNXT)
p r o b :
C- 0 M B COMB Prefix. Number of combinations of n (in
level 2) items taken m (in level 1) at a
time.
P ’ F F M PERM Prefix. Number of permutations of n
(in level 2) items taken m (in level 1) at
a time.
1 1
Postfix. Factorial of a positive integer.
For non-integers, ! returns P(æ -f 1).
R fi N D RAND Command. Returns the next real
number n (0 < ?! < 1) in a
pseudo-random number sequence. Each
random number becomes the seed for
the next random number.
R dp RDZ Command. Takes a real number from
level 1 as a seed for the next random
number (from RAND). 0 in level 1
creates a seed based on the clock time.
A sequence of random numbers can be
repeated by starting with the same
nonzero seed.
12
Calculating Test Statistics
Test statistics are calculated using values you enter on the stack—
they do not use the statistical data stored in SDAT in the STAT
application.
12-4 Functions of Real and Complex Numbers