Example: class OneWayANOVA

import static java.lang.System.out;

import java.util.*;

import javastat.*;

import javastat.inference.*;

import static javastat.util.Output.*;

import javastat.util.*;

/**

* <p>Example: class OneWayANOVA.</p>

* <p>Data Source: Anderson, D. R., Sweeney, D. J. and Williams, T. A. (2001).

* Contemporary Business Statistics with Microsoft Excel. South-Western,

* p. 408. </p>

public class OneWayANOVAExample

{

public static void main(String arg[])

{

double[][] anovadata1 = { {6.0, 7.0, 6.0, 8.0}, {8.0, 9.0, 8.0, 10.0},

{13.0, 14.0, 15.0} };

double[] anovadata21 = {85, 75, 82, 76, 71, 85};

double[] anovadata22 = {71, 75, 73, 74, 69, 82};

double[] anovadata23 = {59, 64, 62, 69, 75, 67};

DataManager dm = new DataManager();

OneWayANOVA testclass1 = new OneWayANOVA(anovadata1);

double testStatistic = testclass1.testStatistic;

double pValue = testclass1.pValue;

OneWayANOVA testclass2 = new OneWayANOVA();

testStatistic = testclass2.testStatistic(anovadata21, anovadata22,

anovadata23);

pValue = testclass2.pValue(anovadata21, anovadata22, anovadata23);

Hashtable argument = new Hashtable();

StatisticalAnalysis testclass3 =new OneWayANOVA(

argument, anovadata21, anovadata22, anovadata23).

statisticalAnalysis;

testStatistic = (Double) testclass3.output.get(TEST_STATISTIC);

pValue = (Double) testclass3.output.get(PVALUE);

OneWayANOVA testclass4 = new OneWayANOVA(argument, null);

testStatistic = testclass4.testStatistic(argument, anovadata1);

pValue = testclass4.pValue(argument, anovadata1);

}

Results:

The test statistic based on non-null constructor for data set I = 49.721

The p-value based on non-null constructor for data set I = 0.0

{DEGREE_OF_FREEDOM=[D@66848c, PVALUE=0.0027,

TEST_STATISTIC=9.0}

The test statistic based on null constructor for data set II = 9.0

The p-value based on null constructor for data set II = 0.0027

{PVALUE=3.074E-5, TEST_STATISTIC=49.721}