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

public static final class MannWhitneyUTest.Result extends BaseSignificanceResult
Result for the Mann-Whitney U test.

This class is immutable.

Since:
1.1
  • Field Details

    • tiedValues

      private final boolean tiedValues
      Flag indicating the data has tied values.
  • Constructor Details

    • 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.
  • Method Details

    • getStatistic

      public double getStatistic()
      Returns the test statistic.

      This is the U1 statistic. Compute the U2 statistic using the original sample lengths n and m using:

       u2 = (long) n * m - u1;
       
      Specified by:
      getStatistic in interface SignificanceResult
      Overrides:
      getStatistic in class BaseSignificanceResult
      Returns:
      the statistic
    • hasTiedValues

      public boolean hasTiedValues()
      Return true 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