Package org.apache.commons.statistics.inference

Class WilcoxonSignedRankTest.Result

java.lang.Object

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

All Implemented Interfaces:

SignificanceResult

Enclosing class:

WilcoxonSignedRankTest

public static final class WilcoxonSignedRankTest.Result
extends Object

Result for the Wilcoxon signed-rank test.

This class is immutable.

Since:

1.1

Method Summary

Modifier and Type	Method	Description
double	getPValue()	Returns the test statistic p-value.
double	getStatistic()	Returns the test statistic.
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 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

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

getStatistic

public double getStatistic()

Description copied from interface: SignificanceResult

Returns the test statistic.

Specified by:

getStatistic in interface SignificanceResult

Returns:

the statistic

getPValue

public double getPValue()

Description copied from interface: SignificanceResult

Returns the test statistic p-value.

The number returned is the smallest significance level at which one can reject the null hypothesis.

Specified by:

getPValue in interface SignificanceResult

Returns:

the p-value