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 TwoSampProps.</p>

*/

public class TwoSampPropsExample

{

public static void main(String arg[])

{

DataManager dm = new DataManager();

TwoSampProps testclass1 =

new TwoSampProps(0.05, 0, "less", 36, 150, 30, 100);

double testStatistic = testclass1.testStatistic;

double pValue = testclass1.pValue;

double lowerBound = testclass1.confidenceInterval[0];

double upperBound = testclass1.confidenceInterval[1];

TwoSampProps testclass2 = new TwoSampProps();

double[] confidenceInterval = testclass2.confidenceInterval(0.05, 36,

150, 30, 100);

testStatistic = testclass2.testStatistic(0, 36, 150, 30, 100);

pValue = testclass2.pValue(0.5, "greater", 36, 150, 30, 100);

Hashtable argument1 = new Hashtable();

argument1.put(NULL_VALUE, 0);

argument1.put(SIDE, "equal");

argument1.put(ALPHA, 0.05);

StatisticalAnalysis testclass3 = new TwoSampProps(argument1, 36, 150,

30, 100).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();

TwoSampProps testclass4 = new TwoSampProps(argument2, null);

argument2.put(ALPHA, 0.05);

confidenceInterval = testclass4.confidenceInterval(argument2, 36, 150,

30, 100);

argument2.put(NULL_VALUE, 0);

testStatistic = testclass4.testStatistic(argument2, 36, 150, 30, 100);

argument2.put(SIDE, "greater");

pValue = testclass4.pValue(argument2, 36, 150, 30, 100);

}

}

Results:

The test statistic based on non-null constructor = -1.054

The p-value based on non-null constructor = 0.292

The confidence interval based on non-null constructor = [-0.173 , 0.053]

{TEST_STATISTIC=-1.054, PROPORTION_H0=0.264, PVALUE=0.292,

PROPORTION_DIFFERENCE_SE_H0=0.0569,

CONFIDENCE_INTERVAL=[D@e0e1c6, POINT_ESTIMATE_SE=0.0569,

POINT_ESTIMATE=-0.06}

The test statistic based on null constructor = -1.054

The p-value based on null constructor = 0.854

The confidence interval based on null constructor = [-0.173 , 0.053]

{TEST_STATISTIC=-1.054, PROPORTION_H0=0.264, PVALUE=0.854,

PROPORTION_DIFFERENCE_SE_H0=0.0569,

CONFIDENCE_INTERVAL=[D@1bf216a, POINT_ESTIMATE_SE=0.0569,

POINT_ESTIMATE=-0.06}

See also:

Estimation and Hypothesis Testing for the Difference

between the Proportions of Two Populations