commons-statistics-inference/src/main/java/org/apache/commons/statistics/inference/TTest.java [269:277]:
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        final long n1 = checkSampleSize(x.length);
        final long n2 = checkSampleSize(y.length);
        final DoubleStatistics.Builder b = DoubleStatistics.builder(Statistic.MEAN, Statistic.VARIANCE);
        final DoubleStatistics s1 = b.build(x);
        final double m1 = s1.getAsDouble(Statistic.MEAN);
        final double v1 = s1.getAsDouble(Statistic.VARIANCE);
        final DoubleStatistics s2 = b.build(y);
        final double m2 = s2.getAsDouble(Statistic.MEAN);
        final double v2 = s2.getAsDouble(Statistic.VARIANCE);
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commons-statistics-inference/src/main/java/org/apache/commons/statistics/inference/TTest.java [396:404]:
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        final long n1 = checkSampleSize(x.length);
        final long n2 = checkSampleSize(y.length);
        final DoubleStatistics.Builder b = DoubleStatistics.builder(Statistic.MEAN, Statistic.VARIANCE);
        final DoubleStatistics s1 = b.build(x);
        final double m1 = s1.getAsDouble(Statistic.MEAN);
        final double v1 = s1.getAsDouble(Statistic.VARIANCE);
        final DoubleStatistics s2 = b.build(y);
        final double m2 = s2.getAsDouble(Statistic.MEAN);
        final double v2 = s2.getAsDouble(Statistic.VARIANCE);
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