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AVVISO DI SEMINARIO
DIPARTIMENTO DI SCIENZE ECONOMICHE E STATISTICHE
Piazzale Europa 1 - 34127 Trieste
tel. 040 - 6767033
La professoressa Regina Y. Liu
Department of Statistics
Rutgers University,
terrą il seguente seminario:
"Data Depth in Multivariate Statistical Analysis
and Aviation Safety Analysis".
Data: MERCOLEDI' 18 OTTOBRE 2000
ore 15, Facoltą di Economia Aula Seminari del Dipartimento
di Scienze Economiche e Statistiche
Summary
A data depth is a measure of how deep or how
central a given point is with respect to a multivariate
distribution. It provides a new geometric approach for
quantifying complex characteristics of a multivariate
distribution, and gives rise to a new set of parameters
for the distribution. These parameters, including
location, scale, quantiles, and skewness, can all be
visualized by simple graphs. Furthermore, the center
outward ranking of the sample points provided by a data
depth leads to a systematic nonparametric multivariate
inference scheme. Applications to DD-(depth
vs. depth) plots, multivariate rank tests, multivariate
process control, robust regression, construction of
confidence regions, and determination of P-values for
hypothesis testing will be discussed. Some applications
will be illustrated using a multivariate dataset of
aviation surveillance results from several airlines.
Cordiali Saluti
Gabriella Schoier
Gabriella Schoier
Dipartimento di Scienze Economiche e
Statistiche
Piazzale Europa 1
34127 Trieste - Italy
phone +39-40-6767922
fax +39-40-567543
mail gabriellas@econ.univ.trieste.it
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