PoissonProbabilityDistribution







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org.statcato.statistics

Class PoissonProbabilityDistribution

java.lang.Object
org.statcato.statistics.DiscreteProbabilityDistribution
org.statcato.statistics.PoissonProbabilityDistribution



public class PoissonProbabilityDistributionextends DiscreteProbabilityDistribution



Poisson probability distribution class.




Since:
1.0
Version:
%I%, %G%
Author:
Margaret Yau











Constructor Summary


PoissonProbabilityDistribution(double lambda)


          Constructs a poisson probability distribution with the given mean.


 






Method Summary



 double
cumulativeProbability(double x)


          Returns the cumulative probabililty up to x.



 double
density(double x)


          Returns the density of the distribution at x.



 java.lang.Double
inverseCumulativeProbability(double area)


          Returns the inverse cumulative probability.


 


Methods inherited from class org.statcato.statistics.DiscreteProbabilityDistribution


inverseCumulativeProbability


 


Methods inherited from class java.lang.Object


clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait


 








Constructor Detail




PoissonProbabilityDistribution

public PoissonProbabilityDistribution(double lambda)

Constructs a poisson probability distribution with the given mean.


Parameters:lambda - mean








Method Detail




density

public double density(double x)

Returns the density of the distribution at x.


Specified by:density in class DiscreteProbabilityDistribution


Parameters:x -
Returns:probability density at x





cumulativeProbability

public double cumulativeProbability(double x)

Returns the cumulative probabililty up to x.


Specified by:cumulativeProbability in class DiscreteProbabilityDistribution


Parameters:x -
Returns:cumulative probability P(












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