org.apache.commons.math.stat.descriptive.moment
Class VarianceTest

java.lang.Object
  junit.framework.Assert
      junit.framework.TestCase
          org.apache.commons.math.stat.descriptive.UnivariateStatisticAbstractTest
              org.apache.commons.math.stat.descriptive.StorelessUnivariateStatisticAbstractTest
                  org.apache.commons.math.stat.descriptive.moment.VarianceTest

All Implemented Interfaces:

junit.framework.Test

public class VarianceTest
extends StorelessUnivariateStatisticAbstractTest

Test cases for the UnivariateStatistic class.

Version:

$Revision: 480442 $ $Date: 2006-11-29 00:21:22 -0700 (Wed, 29 Nov 2006) $

Field Summary

protected org.apache.commons.math.stat.descriptive.moment.Variance

stat

Fields inherited from class org.apache.commons.math.stat.descriptive.StorelessUnivariateStatisticAbstractTest

smallSamples

Fields inherited from class org.apache.commons.math.stat.descriptive.UnivariateStatisticAbstractTest

fourthMoment, geoMean, kurt, max, mean, median, min, percentile5, percentile95, product, secondMoment, skew, std, sum, sumLog, sumSq, testArray, thirdMoment, tolerance, var

Constructor Summary

VarianceTest(java.lang.String name)

Method Summary

double	expectedValue() Expected value for the testArray defined in UnivariateStatisticAbstractTest
org.apache.commons.math.stat.descriptive.UnivariateStatistic	getUnivariateStatistic() Return a new instance of the statistic
protected double	populationVariance(double[] v) Definitional formula for population variance
static junit.framework.Test	suite()
void	testNaN() Make sure Double.NaN is returned iff n = 0
void	testPopulation() Test population version of variance

Methods inherited from class org.apache.commons.math.stat.descriptive.StorelessUnivariateStatisticAbstractTest

testConsistency, testEqualsAndHashCode, testIncrementation, testMomentSmallSamples, testSerialization

Methods inherited from class org.apache.commons.math.stat.descriptive.UnivariateStatisticAbstractTest

getTolerance, testEvaluation

Methods inherited from class junit.framework.TestCase

countTestCases, createResult, getName, run, run, runBare, runTest, setName, setUp, tearDown, toString

Methods inherited from class junit.framework.Assert

assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertFalse, assertFalse, assertNotNull, assertNotNull, assertNotSame, assertNotSame, assertNull, assertNull, assertSame, assertSame, assertTrue, assertTrue, fail, fail, failNotEquals, failNotSame, failSame

Methods inherited from class java.lang.Object

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

Field Detail

stat

protected org.apache.commons.math.stat.descriptive.moment.Variance stat

Constructor Detail

VarianceTest

public VarianceTest(java.lang.String name)

Parameters:

name -

Method Detail

getUnivariateStatistic

public org.apache.commons.math.stat.descriptive.UnivariateStatistic getUnivariateStatistic()

Description copied from class: StorelessUnivariateStatisticAbstractTest

Return a new instance of the statistic

Specified by:

getUnivariateStatistic in class StorelessUnivariateStatisticAbstractTest

suite

public static junit.framework.Test suite()

expectedValue

public double expectedValue()

Description copied from class: StorelessUnivariateStatisticAbstractTest

Expected value for the testArray defined in UnivariateStatisticAbstractTest

Specified by:

expectedValue in class StorelessUnivariateStatisticAbstractTest

testNaN

public void testNaN()

Make sure Double.NaN is returned iff n = 0

testPopulation

public void testPopulation()

Test population version of variance

populationVariance

protected double populationVariance(double[] v)

Definitional formula for population variance