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Statistical Glossary

Gini's Mean Difference:

Gini's mean difference is a descriptive statistic , a measure of variation. For a sample of N values the Gini's mean difference is the average of all pairwise absolute differences:


GMD =  1

N(N-1)

å
ij 
|xi-xj|;   i,j = 1,...,N;   i ¹ j .

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