Abstract (EN):
We consider a set of n individuals described by p standardised variables, and we suppose that the individuals are previously
selected from a population and the variables are a sample of variables
assumed to come from a mixture of k bipolar Watson distributions
defined on the hypersphere.
In this context we provide the identification of the mixture through the
EM algorithm and we also carry out a simulation study to compare
the maximum likelihood estimates obtained from samples of moderate size with
the respective asymptotic estimates. Our simulation results revealed good
performance of the EM algorithm for moderate sample sizes.
Idioma:
Português
Tipo (Avaliação Docente):
Científica