Statistical Numbers

Formula

Average

Median

The median of a series of values is the central value (or the average of the two central values, if n is even) for the ordered series.

Quartile

Standard deviation

Variation coefficient

Relative skewness

The relative skewness is a key figure that contains the information about the asymmetry of the data. If the distribution of data around the median is symmetrical, then the skewness is 0 (zero). If the distribution has a peak with a short tail on the left side and long tail on the right side, then the skewness > 0. If the long tail is on the left side and the short tail is on the right, then the skewness is < 0.

Outlier