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International Conference on Statistics, Combinatorics and Related Areas - 7th International Conference of the Forum for Interdisciplinary Mathematics
December 19-21, 2000
Indian Institute of Technology-Bombay
Mumbai, Maharastra, India

Organizers
Satya N. Mishra (University of South Alabama), Sanjeev V. Sabnis (IIT, Bombay)

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Application of multivariate tests to spatial analysis studies in forestry using near-exact quantiles
by
M. E. Pinto-Preuhsler
Department of Mathematics, Instituto Sup. de Agronomia, 1349-017 Lisboa, PORTUGAL
Coauthors: Carlos A. Coelho (Department of Mathematics, Instituto Sup. de Agronomia, 1349-017 Lisboa, PORTUGAL)

With the main objective of studying competition among trees of the same or different species through their spatial distribution, single tree variables and data related to tree horizontal structure are analyzed using some Bahadur-optimal likelihood ratio tests.

Namely tests for i) the general linear hypothesis, ii) the equality of covariance matrices, iii) the equality of Normal distributions and iv) the independence of several sets of variables are used. Data were collected on growth and yield permanent plots installed in pure and mixed stands of Pinus pinaster, Castanea sativa and Quercus robur in central Portugal. Quantiles computed from near-exact distributions were used to carry out the tests, in cases where the exact distributions were too complicated to be used or were not even available.

Date received: October 16, 2000

Copyright © 2000 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cafr-66.