Example usage for org.apache.commons.math3.stat.descriptive.moment Variance setBiasCorrected

Introduction

In this page you can find the example usage for org.apache.commons.math3.stat.descriptive.moment Variance setBiasCorrected.

Prototype

public void setBiasCorrected(boolean biasCorrected) 

Source Link

Usage

From source file:org.apereo.portal.events.aggr.stat.JpaStatisticalSummary.java

/**
 * Returns the <a href="http://en.wikibooks.org/wiki/Statistics/Summary/Variance">
 * population variance</a> of the values that have been added.
 *
 * <p>Double.NaN is returned if no values have been added.</p>
 *
 * @return the population variance// w w w .  j a v a 2  s  .  c  om
 */
public double getPopulationVariance() {
    Variance populationVariance = new Variance(_getSecondMoment());
    populationVariance.setBiasCorrected(false);
    return populationVariance.getResult();
}

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From source file:org.eclipse.dataset.AbstractDataset.java

@Override
public Number variance(boolean isDatasetWholePopulation) {
    SummaryStatistics stats = getStatistics(false);

    if (isDatasetWholePopulation) {
        Variance newVar = (Variance) stats.getVarianceImpl().copy();
        newVar.setBiasCorrected(false);
        return newVar.getResult();
    }/*from   w w w  . j a va 2s. c  o  m*/
    return stats.getVariance();
}

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