org.statcato.statistics

Class GeometricProbabilityDistribution

java.lang.Object

org.statcato.statistics.DiscreteProbabilityDistribution

org.statcato.statistics.GeometricProbabilityDistribution

public class GeometricProbabilityDistribution
extends DiscreteProbabilityDistribution

Geometric probability distribution class.

Type I: models the number of trials needed to produce the first success
Type II: model the number of failures before the first success

Since:

1.0

Field Summary

Fields

Modifier and Type	Field and Description
static int	TYPEI models the number of trials needed to produce the first success
static int	TYPEII models the number of failures before the first success

Constructor Summary

Constructors

Constructor and Description
GeometricProbabilityDistribution(double p, int type) Constructs a geometric probability distribution with the given success probability and type.

Method Summary

Modifier and Type	Method and Description
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

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

Field Detail

TYPEI

public static int TYPEI

models the number of trials needed to produce the first success

TYPEII

public static int TYPEII

models the number of failures before the first success

Constructor Detail

GeometricProbabilityDistribution

public GeometricProbabilityDistribution(double p,
                                        int type)

Constructs a geometric probability distribution with the given success probability and type.

Parameters:

p - success probability

type - TYPEI (models the number of trials needed to produce the first success) or TYPEII (model the number of failures before the first success)

Method Detail

density

public double density(double x)

Returns the density of the distribution at x.

Specified by:

density in class DiscreteProbabilityDistribution

Parameters:

x - an integer

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(<=x)

inverseCumulativeProbability

public java.lang.Double inverseCumulativeProbability(double area)

Returns the inverse cumulative probability.

Parameters:

area - cumulative probability

Returns:

inverse cumulative probability