org.statcato.statistics

Class NormalProbabilityDistribution

java.lang.Object

org.statcato.statistics.ProbabilityDistribution

org.statcato.statistics.NormalProbabilityDistribution

public class NormalProbabilityDistribution
extends ProbabilityDistribution

Normal probability distribution class.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
NormalProbabilityDistribution(double mu, double sigma) Constructor a normal probability distribution given the mean and standard deviation.

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.
double	inverseCumulativeProbability(double area) Returns the inverse cumulative probability.

Methods inherited from class org.statcato.statistics.ProbabilityDistribution

inverseCumulativeProbability

Methods inherited from class java.lang.Object

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

Constructor Detail

NormalProbabilityDistribution

public NormalProbabilityDistribution(double mu,
                                     double sigma)

Constructor a normal probability distribution given the mean and standard deviation.

Parameters:

mu - mean

sigma - standard deviation

Method Detail

density

public double density(double x)

Returns the density of the distribution at x.

Specified by:

density in class ProbabilityDistribution

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 ProbabilityDistribution

Parameters:

x -

Returns:

cumulative probability P(<=x)

inverseCumulativeProbability

public double inverseCumulativeProbability(double area)

Returns the inverse cumulative probability.

Parameters:

area - cumulative probability

Returns:

inverse cumulative probability