skewness
Computes the skewness of all observations.
Returns Double.NaN if fewer than 3 observations have been added. Returns 0.0 if the variance is zero (constant data).
Return
the skewness, or Double.NaN if insufficient data.
Parameters
kind
whether to compute sample-adjusted (Fisher-Pearson) or population skewness. Defaults to PopulationKind.SAMPLE.