Difference between revisions of "Poisson Command"

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:First parameter is same as above.
 
:First parameter is same as above.
 
==CAS Specific Syntax==
 
==CAS Specific Syntax==
In [[CAS View]] only one syntax is supported:
 
 
;Poisson[ <Mean λ>, <Variable Value v>, <Boolean Cumulative> ]
 
;Poisson[ <Mean λ>, <Variable Value v>, <Boolean Cumulative> ]
 
:Let X be a Poisson random variable.
 
:Let X be a Poisson random variable.
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:Returns P( X ≤ ''v'') when ''Cumulative'' = true.
 
:Returns P( X ≤ ''v'') when ''Cumulative'' = true.
 
:First parameter is same as above.
 
:First parameter is same as above.
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:{{example|1=<div><code><nowiki>Poisson[3, 1, true]</nowiki></code> yields '' <math>\frac{4}{e³}</math>''.</div>}}
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:{{example|1=<div><code><nowiki>Poisson[3, 1, false]</nowiki></code> yields '' <math>\frac{3}{e³}</math>''.</div>}}

Revision as of 11:02, 18 December 2012



Poisson[ <Mean λ> ]
Returns a bar graph of a Poisson distribution with given mean λ.
Poisson[ <Mean λ>, <Boolean Cumulative> ]
Returns a bar graph of a Poisson distribution when Cumulative = false.
Returns a bar graph of a cumulative Poisson distribution when Cumulative = true.
The first parameter is same as above.
Poisson[ <Mean λ>, <Variable Value v>, <Boolean Cumulative> ]
Let X be a Poisson random variable.
Returns P( X = v) when Cumulative = false.
Returns P( X ≤ v) when Cumulative = true.
First parameter is same as above.

CAS Specific Syntax

Poisson[ <Mean λ>, <Variable Value v>, <Boolean Cumulative> ]
Let X be a Poisson random variable.
Returns P( X = v) when Cumulative = false.
Returns P( X ≤ v) when Cumulative = true.
First parameter is same as above.
Example:
Poisson[3, 1, true] yields \frac{4}{e³}.
Example:
Poisson[3, 1, false] yields \frac{3}{e³}.
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