Currently standard deviation returned is "uncorrected sample standard
deviation" (calculated from varianceN - of the entire population). While
Javadoc states this more or less clearly, it is probably expected to be aligned
with variance (unbiased, corrected one).
This is more in line with other libs, e.g.
org.apache.commons.math3.stat.descriptive.SummaryStatistics#getStandardDeviation
. Previous values can still be calculated with sqrt(varianceN).
Original issue reported on code.google.com by virgo47 on 1 Feb 2014 at 11:12
Original issue reported on code.google.com by
virgo47
on 1 Feb 2014 at 11:12