datafu-pig/src/main/java/datafu/pig/stats/LongVAR.java [364:372]:
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    public Double getValue() {
        Double var = null;
        if (intermediateCount != null && intermediateCount > 0) {
            Double avg = new Double((double)intermediateSum / intermediateCount);
            Double avgSquare = new Double((double)intermediateSumSquare / intermediateCount);
            var = avgSquare - avg*avg;
        }
        return var;
    }
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datafu-pig/src/main/java/datafu/pig/stats/IntVAR.java [363:371]:
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    public Double getValue() {
        Double var = null;
        if (intermediateCount != null && intermediateCount > 0) {
            Double avg = new Double((double)intermediateSum / intermediateCount);
            Double avgSquare = new Double((double)intermediateSumSquare / intermediateCount);
            var = avgSquare - avg*avg;
        }
        return var;
    }
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