Listy Biometryczne - Biometrical Letters Vol. 33(1996), No. 2, 59-69
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SAMPLING A MULTI-TRAIT REPRESENTATIVE SAMPLE
Anna Bartkowiak Institute of Computer Science, University of Wrocław, Przesmyckiego 20, Wrocław 51-151, e-mail: aba@ii.uni.wroc.pl |
The paper is concerned with graphical comparisons of the distributional resemblance of a subsample and an entire sample - when p > 2 traits taking values on the con-tinuous scalę arę considered. Two methods arę proposed: (1) The group referenced Q-Q plot of Mahalanobis distances, and: (2) The group referenced polygon plot. Al-gorithms for the proposed methods arę given. The methods arę illustrated with a real example dealing with medical data.
sampling, representativeness, Q-Q plot, Mahalanobis distance, polygon plot
