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315
Distribution 18 - 8
kk
kk
k Poisson Distribution
You can use the following menu to select from the different types of Poisson
distribution.
•{Ppd}/{Pcd} ... {Poisson probability}/{Poisson cumulative density} calculation
uu
uu
uPoisson probability
Poisson probability calculates whether data taken from a Poisson distribution is less
than a specific value.
f(x)
=
x!
e
–
x
µ
µ
(x = 0, 1, 2, ···)
µ
: population mean (
µ
> 0)
Perform the following key operation from the statistical data list.
5(DIST)
6(g)
1(POISN)
1(Ppd)
The following shows the meaning of each item when data is specified using list
specification.
Data................ data type
List.................. list whose contents you want to use as sample data
µ
..................... population mean (
µ
> 0)
Execute .......... executes a calculation
The following shows the meaning of parameter data specification item that is
different from list data specification.
x ..................... value
Example To calculate Poisson probability for one list of data
For this example, we will calculate Poisson probability for data
= {2, 3, 4} when
µ
= 6.
1(List)c
1(List1)c
gw
1(CALC)
probability when
x = 2
probability when x = 3
probability when x = 4
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