Class MannWhitneyUTest.Result
java.lang.Object
org.apache.commons.statistics.inference.BaseSignificanceResult
org.apache.commons.statistics.inference.MannWhitneyUTest.Result
- All Implemented Interfaces:
SignificanceResult
- Enclosing class:
MannWhitneyUTest
Result for the Mann-Whitney U test.
This class is immutable.
- Since:
- 1.1
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final boolean
Flag indicating the data has tied values. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiondouble
Returns the test statistic.boolean
Returntrue
if the data had tied values.Methods inherited from class org.apache.commons.statistics.inference.BaseSignificanceResult
getPValue
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
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Field Details
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tiedValues
private final boolean tiedValuesFlag indicating the data has tied values.
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Constructor Details
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Result
Result(double statistic, boolean tiedValues, double p) Create an instance.- Parameters:
statistic
- Test statistic.tiedValues
- Flag indicating the data has tied values.p
- Result p-value.
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Method Details
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getStatistic
public double getStatistic()Returns the test statistic.This is the U1 statistic. Compute the U2 statistic using the original sample lengths
n
andm
using:u2 = (long) n * m - u1;
- Specified by:
getStatistic
in interfaceSignificanceResult
- Overrides:
getStatistic
in classBaseSignificanceResult
- Returns:
- the statistic
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hasTiedValues
public boolean hasTiedValues()Returntrue
if the data had tied values.Note: The exact computation cannot be used when there are tied values.
- Returns:
true
if there were tied values
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