School Seminars and Colloquia

How many components are there in the normal mixture model for the galaxy (Session 1)

Joint Psychology/Applied Statistics Colloquium

by Murray Aitkin

Institution: Department of Psychology, University of Melbourne
Date: Mon 9th May 2005
Time: 1:05 PM
Location: Theatre 1, Old Geology

Abstract: The galaxy data and clustering of recession velocities of galaxies. The
normal mixture model for clustering. ML by the EM algorithm. Increasing
the number of components.

How many components? - Non-regular behaviour of the LRT for comparing K
and K-1 components. Bootstrapping the LR test. Difficulties with test size.

For More Information: Owen Jones tel:8344-6412 email:

Colloquium Website