The base SAS procedures use a standardized set of keywords to refer to statistics. You specify these keywords in SAS statements to request the statistics to be displayed or stored in an output data set. The base procedures automatically exclude the values of with missing weights from the analysis. By default, the base procedures treat a negative weight as if it is equal to zero. The standard keywords and formulas for each statistic follow.
Some formulas use keywords to designate the corresponding statistic.
N, the kurtosis is computed as and the weighted kurtosis is computed as where is . The formula is invariant under the transformation . MAX is the maximum value of . MEAN is the arithmetic mean . MIN is the minimum value of .