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13-34 Inferential Statistics and Distributions
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 34 of 36
poissoncdf( computes a cumulative probability at
x
for the
discrete Poisson distribution with the specified mean
m
,
which must be a real number > 0.
x
can be a real number
or a list of real numbers.
poissoncdf(
m
,
x
)
geometpdf( computes a probability at
x
, the number of the
trial on which the first success occurs, for the discrete
geometric distribution with the specified probability of
success
p
. 0
p
1 must be true.
x
can be an integer or a list
of integers. The probability density function (pdf) is:
fx p p x
x
() ( )
=− =
−
112
1
,,,
geometpdf(
p
,
x
)
geometcdf( computes a cumulative probability at
x
, the
number of the trial on which the first success occurs, for
the discrete geometric distribution with the specified
probability of success
p
. 0
p
1 must be true.
x
can be a
real number or a list of real numbers.
geometcdf(
p
,
x
)
poissoncdf(
geometpdf(
geometcdf(