Examples of org.apache.commons.math.stat.inference.TTestImpl.tTest()

Package org.apache.commons.math.stat.inference

Class org.apache.commons.math.stat.inference.TTestImpl

Examples of org.apache.commons.math.stat.inference.TTestImpl.tTest()

org.apache.commons.math.stat.inference.TTestImpl.tTest()
asic.nwu.edu/statguidefiles/ttest_unpaired_ass_viol.html">here
Preconditions:
- The observed array length must be at least 2.
@param mu constant value to compare sample mean against @param sample array of sample data values @return p-value @throws IllegalArgumentException if the precondition is not met @throws MathException if an error occurs computing the p-value

  private String getPvalue(DescriptiveStatistics group1,
      DescriptiveStatistics group2) {
    TTestImpl ttest = new TTestImpl();
    String sig = "";
    try {
      double pValue = ttest.tTest(group1, group2);
      if (pValue < 0.05) {
        sig = "*";
      }
      if (pValue < 0.01) {
        sig = "**";

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