StandardDeviationTest (Commons Math 3.2 Test API)

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org.apache.commons.math3.stat.descriptive.moment
Class StandardDeviationTest

java.lang.Object
  org.apache.commons.math3.stat.descriptive.UnivariateStatisticAbstractTest
      org.apache.commons.math3.stat.descriptive.StorelessUnivariateStatisticAbstractTest
          org.apache.commons.math3.stat.descriptive.moment.StandardDeviationTest

public class StandardDeviationTest
extends StorelessUnivariateStatisticAbstractTest
extends StorelessUnivariateStatisticAbstractTest

Test cases for the UnivariateStatistic class.

Version:: $Id: StandardDeviationTest.java 1244107 2012-02-14 16:17:55Z erans $

Field Summary
`protected StandardDeviation`	`stat`

Fields inherited from class org.apache.commons.math3.stat.descriptive.StorelessUnivariateStatisticAbstractTest
`smallSamples`

Fields inherited from class org.apache.commons.math3.stat.descriptive.UnivariateStatisticAbstractTest
`fourthMoment, geoMean, identicalWeightsArray, kurt, max, mean, median, min, percentile5, percentile95, product, secondMoment, skew, std, sum, sumLog, sumSq, testArray, testWeightsArray, thirdMoment, tolerance, unitWeightsArray, var, weightedMean, weightedProduct, weightedStd, weightedSum, weightedVar`

Constructor Summary
`StandardDeviationTest()`

Method Summary
`double`	`expectedValue()` Expected value for the testArray defined in UnivariateStatisticAbstractTest
`UnivariateStatistic`	`getUnivariateStatistic()` Return a new instance of the statistic
`protected double`	`populationStandardDeviation(double[] v)` Definitional formula for population standard deviation
`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.math3.stat.descriptive.StorelessUnivariateStatisticAbstractTest
`checkClearValue, testConsistency, testCopyConsistency, testEqualsAndHashCode, testIncrementation, testMomentSmallSamples, testSerial, testSerialization`

Methods inherited from class org.apache.commons.math3.stat.descriptive.UnivariateStatisticAbstractTest
`getTolerance, testCopy, testEvaluateArraySegment, testEvaluateArraySegmentWeighted, testEvaluation, testWeightedConsistency`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

stat

protected StandardDeviation stat

Constructor Detail

StandardDeviationTest

public StandardDeviationTest()

Method Detail

getUnivariateStatistic

public UnivariateStatistic getUnivariateStatistic()

Return a new instance of the statistic

Specified by:: getUnivariateStatistic in class StorelessUnivariateStatisticAbstractTest

expectedValue

public double expectedValue()

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

populationStandardDeviation

protected double populationStandardDeviation(double[] v)

Definitional formula for population standard deviation