package com.imsl.test.example.stat;

import java.text.*;
import com.imsl.*;
import com.imsl.stat.*;

/**
 * <p>Performs a rank sum test.
 * </p>
 * <p>
 * The following example is taken from Conover (1980, p. 224). It involves the
 * mixing time of two mixing machines using a total of \(10\) batches of a certain
 * kind of batter, five batches for each machine. The null hypothesis is not
 * rejected at the \(5\)-percent level of significance.</p>
 *
 *
 * @see <a href="WilcoxonRankSumEx1.java">Code</a>
 * @see <a href="doc-files/WilcoxonRankSumEx1.out">Output</a>
 */

public class WilcoxonRankSumEx1 {

    public static void main(String args[]) {
        double[] x = {7.3, 6.9, 7.2, 7.8, 7.2};
        double[] y = {7.4, 6.8, 6.9, 6.7, 7.1};

        WilcoxonRankSum wilcoxon = new WilcoxonRankSum(x, y);
        NumberFormat nf = NumberFormat.getInstance();
        nf.setMaximumFractionDigits(4);

        // Turn off printing of warning messages.
        Warning.setOut(null);

        System.out.println("p-value = " + nf.format(wilcoxon.compute()));
    }
}