Example: class MatchedSampMeansTTest

import static java.lang.System.out;

import java.util.*;

import javastat.*;

import javastat.inference.twosamples.*;

import static javastat.util.Argument.*;

import static javastat.util.Output.*;

import javastat.util.*;

/**

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

public class MatchedSampMeansTTestExample

{

public static void main(String arg[])

{

double[] testdata1 = {51, 22, 17, 11, 28, 17, 5, 21, 22, 10};

double[] testdata2 = {32, 14, 9, 8, 28, 11, 3, 23, 12, 14};

DataManager dm = new DataManager();

MatchedSampMeansTTest testclass1 =

new MatchedSampMeansTTest(0.05, 0, "equal", testdata1,

testdata2);

double testStatistic = testclass1.testStatistic;

double pValue = testclass1.pValue;

double lowerBound = testclass1.confidenceInterval[0];

double upperBound = testclass1.confidenceInterval[1];

MatchedSampMeansTTest testclass2 =

new MatchedSampMeansTTest();

double[] confidenceInterval = testclass2.confidenceInterval(0.05,

testdata1, testdata2);

testStatistic = testclass2.testStatistic(0, testdata1, testdata2);

pValue = testclass2.pValue(0, "greater", testdata1, testdata2);

Hashtable argument1 = new Hashtable();

argument1.put(ALPHA, 0.05);

argument1.put(NULL_VALUE, 0);

argument1.put(SIDE, "equal");

StatisticalAnalysis testclass3 =

new MatchedSampMeansTTest(argument1, testdata1,

testdata2).statisticalAnalysis;

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

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

confidenceInterval = (double[]) testclass3.output.get(

CONFIDENCE_INTERVAL);

lowerBound = confidenceInterval[0];

upperBound = confidenceInterval[1];

Hashtable argument2 = new Hashtable();

MatchedSampMeansTTest testclass4 =

new MatchedSampMeansTTest(argument2, null);

argument2.put(ALPHA, 0.05);

confidenceInterval = testclass4.confidenceInterval(

argument2, testdata1, testdata2);

argument2.put(NULL_VALUE, 0);

testStatistic = testclass4.testStatistic(argument2, testdata1, testdata2);

argument2.put(SIDE, "greater");

pValue = testclass4.pValue(argument2, testdata1, testdata2);

}

Results:

The test statistic based on non-null constructor = 2.348

The p-value based on non-null constructor = 0.043

The confidence interval based on non-null constructor = [0.183 , 9.817]

{POINT_ESTIMATE=5.0, PVALUE=0.043, TEST_STATISTIC=2.348,

DEGREE_OF_FREEDOM=9.0, POINT_ESTIMATE_SE=2.129,

CONFIDENCE_INTERVAL=[D@c20e24}

The test statistic based on null constructor = 2.348

The p-value based on null constructor = 0.022

The confidence interval based on null constructor = [0.183 , 9.817]

{PVALUE=0.0217, TEST_STATISTIC=2.348,

CONFIDENCE_INTERVAL=[D@2e7263}