Thefore I tried to use robust regression, with rlm. My questions are:
1 - how do I get the test of bias of the robust regression? In the S-Plus guide (p. 338), it is said that this test should be used to choose between the robust regression and the other one. Is this correct?
2 - when I run an anova, comparing the complete rlm model to a more simple model, I get no values for F nor P. How do I get these?
3 - may I use robust regression for count response variables, taking the log of the data?
Thank you all!
Carlos Sperber, Carla Galbiati & Carla Ribas
Carlos Frankl Sperber Ecology - Orthoptera: Grylloidea
Departamento de Biologia Geral Universidade Federal de Viçosa 3.570-000 - Viçosa - MG Brazil
tel: +55 (31) 3899 2556 fax: +55 (31) 3899 2549 E-mail: [EMAIL PROTECTED]
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