Texas Instruments TI-83

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

() ( )

=− =

−

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(