Package org.apache.commons.statistics.inference

Class WilcoxonSignedRankTest.Result

java.lang.Object

org.apache.commons.statistics.inference.BaseSignificanceResult

org.apache.commons.statistics.inference.WilcoxonSignedRankTest.Result

All Implemented Interfaces:

SignificanceResult

Enclosing class:

WilcoxonSignedRankTest

public static final class WilcoxonSignedRankTest.Result
extends BaseSignificanceResult

Result for the Wilcoxon signed-rank test.

This class is immutable.

Since:

1.1

Field Summary

Fields

Modifier and Type	Field	Description
private final boolean	tiedValues	Flag indicating the data had tied values.
private final boolean	zeroValues	Flag indicating the data had zero values.

Constructor Summary

Constructors

Constructor	Description
Result(double statistic, boolean tiedValues, boolean zeroValues, double p)	Create an instance.

Method Summary

Modifier and Type	Method	Description
boolean	hasTiedValues()	Return true if the data had tied values (with equal ranks).
boolean	hasZeroValues()	Return true if the data had zero values.

Methods inherited from class org.apache.commons.statistics.inference.BaseSignificanceResult

getPValue, getStatistic

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.statistics.inference.SignificanceResult

reject

Field Details

tiedValues

private final boolean tiedValues

Flag indicating the data had tied values.

zeroValues

private final boolean zeroValues

Flag indicating the data had zero values.

Constructor Details

Result

Result(double statistic,
 boolean tiedValues,
 boolean zeroValues,
 double p)

Create an instance.

Parameters:

statistic - Test statistic.

tiedValues - Flag indicating the data had tied values.

zeroValues - Flag indicating the data had zero values.

p - Result p-value.

Method Details

hasTiedValues

public boolean hasTiedValues()

Return true if the data had tied values (with equal ranks).

Note: The exact computation cannot be used when there are tied values. The p-value uses the asymptotic approximation using a tie correction.

Returns:

true if there were tied values

hasZeroValues

public boolean hasZeroValues()

Return true if the data had zero values. This occurs when the differences between sample values matched the expected location shift: z = x - y == mu.

Note: The exact computation cannot be used when there are zero values. The p-value uses the asymptotic approximation.

Returns:

true if there were zero values