Lehemann <lehemann@crosswinds.net> wrote:

: For my problem, I just need to add another Class variable in the : class statement. BUT, it seems in this analysis, the Response : variables need to be Continuous data, while my Reponse are : Ordinal data (from multiple-choice questions of sampling paper)

: So, is there any other way to do this analysis suitable for my : data?

It depends on the nature of the multiple choice questions. If a Likert-type item is scaled poperly (or if you understand the scaling properties very well), there's really no harm in analyzing it as if it were a continuous variable. If you are summing several Likert-type items, which would be more desirable than analyzing separate items, there is even less of a problem; again, this assumes that the items were constructed carefully.

Mike Babyak

-- _________________________________________________________________ Michael A. Babyak, PhD (919) 684-8843 (Voice) Box 3119 (919) 684-8629 (Fax) Department of Psychiatry Duke University Medical Center mbabyak@duke.edu Durham, NC 27710 _________________________________________________________________ In Flumine Stercoris Noli Undas Facere _________________________________________________________________