com.numericalmethod.suanshu.stats.test.rank
Class SiegelTukey

java.lang.Object
  com.numericalmethod.suanshu.stats.test.HypothesisTest
      com.numericalmethod.suanshu.stats.test.rank.SiegelTukey

public class SiegelTukey
extends HypothesisTest

Siegel–Tukey tests for differences in scale (variability) between two groups.

The test is used to determine if one of two groups of data tends to have more widely dispersed values than the other. In other words, the test determines whether one of the two groups tends to move, sometimes to the right, sometimes to the left, but away from the center (of the ordinal scale).

See Also:

Wikipedia: iegel–Tukey test

Field Summary

double	pValue1SidedGreater right, one-sided p-value
double	pValue1SidedLess left, one-sided p-value

Fields inherited from class com.numericalmethod.suanshu.stats.test.HypothesisTest

k, N, pValue, testStatistics

Constructor Summary

SiegelTukey(double[] sample1, double[] sample2)
Perform the Siegel-Tukey test to test for differences in scale (variability) between two groups.

SiegelTukey(double[] sample1, double[] sample2, double mu)
Perform the Siegel-Tukey test to test for differences in scale (variability) between two groups.

SiegelTukey(double[] sample1, double[] sample2, double mu, boolean isExact)
Perform the Siegel-Tukey test to test for differences in scale (variability) between two groups.

Method Summary

java.lang.String	alternativeHypothesis() Get a description of the alternative hypothesis.
java.lang.String	nullHypothesis() Get a description of the null hypothesis.

Methods inherited from class com.numericalmethod.suanshu.stats.test.HypothesisTest

oneSidedPvalue, pValue, rejectNull, testStatistics

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

pValue1SidedLess

public final double pValue1SidedLess

left, one-sided p-value

pValue1SidedGreater

public final double pValue1SidedGreater

right, one-sided p-value

Constructor Detail

SiegelTukey

public SiegelTukey(double[] sample1,
                   double[] sample2,
                   double mu,
                   boolean isExact)

Perform the Siegel-Tukey test to test for differences in scale (variability) between two groups.

Parameters:

sample1 - sample 1

sample2 - sample 2

mu - the hypothetical mean difference

isExact - indicate whether the exact Wilcoxon Rank Sum distribution is used

SiegelTukey

public SiegelTukey(double[] sample1,
                   double[] sample2,
                   double mu)

Perform the Siegel-Tukey test to test for differences in scale (variability) between two groups.

Parameters:

sample1 - sample 1

sample2 - sample 2

mu - the hypothetical mean difference

SiegelTukey

public SiegelTukey(double[] sample1,
                   double[] sample2)

Perform the Siegel-Tukey test to test for differences in scale (variability) between two groups.

Parameters:

sample1 - sample 1

sample2 - sample 2

Method Detail

nullHypothesis

public java.lang.String nullHypothesis()

Description copied from class: HypothesisTest

Get a description of the null hypothesis.

Specified by:

nullHypothesis in class HypothesisTest

Returns:

the null hypothesis description

See Also:

Wikipedia: Null hypothesis

alternativeHypothesis

public java.lang.String alternativeHypothesis()

Description copied from class: HypothesisTest

Get a description of the alternative hypothesis.

Specified by:

alternativeHypothesis in class HypothesisTest

Returns:

the alternative hypothesis description

See Also:

Wikipedia: Alternative hypothesis