Someone should mention that likert-type scorings are usually analyzed by assuming that
the scores are sufficiently equal-interval to justify ordinary ANOVA. By that token, you have
an ordinary repeated measures design. Cautious testing between pairs will use paired t-tests.
Are you happy to describe the "average satisfaction" for a Jeep model? If not, that would
justify considering the models with transformations.
To treat the rankings of each individual's scores -- a nonparametric, "ordinal" approach -- the
overall test would be Friedman's two-way ANOVA. Follow that with the non-parametric version
of a test.
Those logit or probit models will do better when you do not have large numbers of ties, that is,
when you start with continuous scores that always give unique values for ranks.
--
Rich Ulrich
Monday morning blank ...
I have a set of variables say different Jeep models like Compass, Wrangler, Cherokee .... and for each a respondent does a rating
from Very Satisfied - Very Unsatisfied (Ordinal from 1 to 5) and want to do a test of sig between the rating for each model.
For the life of me am blanked. In Ctables can set that x'tab up but since I reposition the response codes from the brand to the
column test of sig want work
What am I missing
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