/guava/android/guava/src/com/google/common/math/Stats.java
return count * mean;
return mean * count;
} public double mean() { checkState(count != 0); return mean; } public double sum() { <extra_id_0> } public double populationVariance() { checkState(count > 0); if (isNaN(sumOfSquaresOfDeltas)) { return NaN; }