McMaster University

Graduate Program in Statistics



STATISTICS SEMINAR



SPEAKER:
Adolfo Quiroz,
Department of Scientific Computing and Statistics
Simon Bolivar University, Venezuala
Date :Wednesday February 27, 2002.
Time : 3:30pm
Address Burke Science Building
Room: 138
TITLE:
A vectorial notion of skewness and its use in testing for multivariate symmetry.
ABSTRACT:
By modifying the statistic of Malkovich and Afifi (1973), we introduce a notion of multivariate skewness that provides both a magnitude and an overall direction for the skewness present in multivariate data. This notion leads to a test statistic for the null hypothesis of multivariate symmetry. Under mild assumptions, we find the asymptotic distribution of the test statistic and evaluate, by simulations, the convergence of the finite sample size quantiles to their limits, as well as the power of the statistic against some alternatives.

This is joint work with N.Balakrishnan and M. R. Brito

About the Speaker
Dr. Quiroz is currently visiting McMaster from Simon Bolivar University in Caracas, Venezuala. He received his Ph.D. from MIT in 1986 under the direction of Richard M. Dudley and then held a postdoctoral position at Bell Communications Research for two years. Since then he has worked at Simon Bolivar Univeristy. His main research interests lie in statistical applications of empirical processes and methods of graph theory in statistics.
References
A preprint of the paper on which this talk is based is available here in PDF and postscript formats. See the references cited in the paper for more information.


Department of Mathematics and Statistics
Graduate Program in Statistics

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Last updated on January 29, 2002