Casio FX-9750G PLUS User's Manual & Technical Reference page 344

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Distribution
k k k k k Poisson Distribution
You can use the following menu to select from the different types of Poisson
distribution.
u u u u u Poisson probability
Poisson probability calculates a probability at specified value for the discrete Poisson
distribution with the specified mean.
Perform the following key operations from the statistical data list.
The following shows the meaning of each item when data is specified using list
specification.
The following shows the meaning of a parameter data specification item that is
different from list data specification.
316
• {Ppd}/{Pcd} ... {Poisson probability}/{Poisson cumulative density} calculation
µ
µ
e – x
f (x) =
x!
5(DIST)
6(g)
1(POISN)
1(Ppd)
Data ................ data type
List .................. list whose contents you want to use as sample data
µ ..................... mean ( µ > 0)
Execute .......... executes a calculation
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
probability when
probability when
x
( = 0, 1, 2, ···)
x
= 2
x
= 3
x
= 4
µ : mean ( µ > 0)