CalculateMoment calculates the n-th moment of the DataList.
Returns the n-th moment and error.
Returns nil if the DataList is empty or the n-th moment cannot be calculated.
Kurtosis calculates the kurtosis(sample) of the DataList.
Returns the kurtosis.
Returns nil if the DataList is empty or the kurtosis cannot be calculated.
Skewness calculates the skewness(sample) of the DataList.
Returns the skewness.
Returns nil if the DataList is empty or the skewness cannot be calculated.