/guava/guava/src/com/google/common/math/PairedStatsAccumulator.java
return xStats.snapshot ( ) ;
return new PairedStats(xStats.snapshot(), yStats.snapshot(), sumOfProductsOfDeltas); } public long count() { return xStats.count(); } public Stats xStats() { <extra_id_0> } public Stats yStats() { return yStats.snapshot(); } public double populationCovariance() { checkState(count() != 0);