commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/stat/inference/ChiSquareTest.java [81:97]:
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        throws NotPositiveException, NotStrictlyPositiveException,
        DimensionMismatchException {

        if (expected.length < 2) {
            throw new DimensionMismatchException(expected.length, 2);
        }
        if (expected.length != observed.length) {
            throw new DimensionMismatchException(expected.length, observed.length);
        }
        MathArrays.checkPositive(expected);
        MathArrays.checkNonNegative(observed);

        double sumExpected = 0d;
        double sumObserved = 0d;
        for (int i = 0; i < observed.length; i++) {
            sumExpected += expected[i];
            sumObserved += observed[i];
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commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/stat/inference/GTest.java [77:93]:
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            throws NotPositiveException, NotStrictlyPositiveException,
            DimensionMismatchException {

        if (expected.length < 2) {
            throw new DimensionMismatchException(expected.length, 2);
        }
        if (expected.length != observed.length) {
            throw new DimensionMismatchException(expected.length, observed.length);
        }
        MathArrays.checkPositive(expected);
        MathArrays.checkNonNegative(observed);

        double sumExpected = 0d;
        double sumObserved = 0d;
        for (int i = 0; i < observed.length; i++) {
            sumExpected += expected[i];
            sumObserved += observed[i];
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