Texas Instruments TI-83 Manual Book page 271

binompdf(
binomcdf(
poissonpdf(
computes a probability at x for the discrete
binompdf(
binomial distribution with the specified numtrials and
probability of success (p) on each trial. x can be an integer
or a list of integers. 0p1 must be true. numtrials must be
an integer > 0. If you do not specify x, a list of probabilities
from 0 to numtrials is returned. The probability density
function (pdf) is:
n
x
f x ( ) x p ( 1
where
numtrials
binompdf(
computes a cumulative probability at x for the
binomcdf(
discrete binomial distribution with the specified numtrials
and probability of success (p) on each trial. x can be a real
number or a list of real numbers. 0p1 must be true.
numtrials must be an integer > 0. If you do not specify x, a
list of cumulative probabilities is returned.
numtrials
binomcdf(
computes a probability at x for the discrete
poissonpdf(
Poisson distribution with the specified mean m, which must
be a real number > 0. x can be an integer or a list of
integers. The probability density function (pdf) is:
x
( )
f x e / x x
m
x
poissonpdf( , )
Inferential Statistics and Distributions 13-33
n x
p ) , x 0 1 , , ,
n = numtrials
p[ x ]
, , )
p[ x ]
, , )
0 1 2 
!
, , , ,

n