Composite Statistic Codes. Column header "CS" in results reports. Code Name Description ---- ---- --------------------------------- A AVE Average H MAX Maximum L MIN Minimum N NUM Number of observations for the sample. S SD Standard deviation. U SS Sum of squares. V VAR Variance C COE Coefficient of error. X COV Coefficient of variance. E SKW Skewness F KUR Kurtosis Z EXC Number of samples in composite exceeds established limit. % PRE Precision $ ACC Accuracy D REP Sample is not a composite. Indicates replicate sample. B Sample is not a composite. None of the above apply.