Casio CFX-9970G User Manual page 335

k k k k 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
u u u u u Poisson probability
Poisson probability calculates whether data taken from a Poisson distribution is less
than a specific value.
– µ x
e µ
f (x) =
x!
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
probability when
probability when
x
( = 0, 1, 2, ···)
x
= 2
x
= 3
x
= 4
18 - 8
Distribution
µ : population mean ( µ > 0)
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