edu.udo.cs.yale.tools.math
Class AnovaCalculator

java.lang.Object
  edu.udo.cs.yale.tools.math.AnovaCalculator

public class AnovaCalculator
extends java.lang.Object

Determines if the null hypothesis (all actual mean values are the same) holds for the given values. This class uses an ANalysis Of VAriances approach to determine probability that the null hypothesis is wrong.

Version:

$Id: AnovaCalculator.java,v 1.10 2006/08/03 14:39:34 ingomierswa Exp $

Author:

Ingo Mierswa

Nested Class Summary

class	AnovaCalculator.AnovaSignificanceTestResult
private static class	AnovaCalculator.Group Helper class containing all information about a group, i.e. the number of elements, the mean and variance value.

Field Summary

private double	alpha
private java.util.List<AnovaCalculator.Group>	groups

Constructor Summary

AnovaCalculator()

Method Summary

void	addGroup(int numberOfValues, double mean, double variance)
void	clearGroups()
SignificanceTestResult	performSignificanceTest()
void	setAlpha(double alpha)

Methods inherited from class java.lang.Object

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

Field Detail

alpha

private double alpha

groups

private java.util.List<AnovaCalculator.Group> groups

Constructor Detail

AnovaCalculator

public AnovaCalculator()

Method Detail

setAlpha

public void setAlpha(double alpha)

addGroup

public void addGroup(int numberOfValues,
                     double mean,
                     double variance)

clearGroups

public void clearGroups()

performSignificanceTest

public SignificanceTestResult performSignificanceTest()
                                               throws SignificanceCalculationException

Throws:

SignificanceCalculationException