Modeling and Multivariate Methods - SAS

218 Performing Logistic Regression on Nominal and Ordinal Responses Chapter 7
Example of an Ordinal Logistic Model
Figure 7.19 Two-Factor Model
The report shown in Figure 7.19 supports the conclusion that previous use of a detergent brand, and water
temperature, have an effect on detergent preference, and the interaction between temperature and previous
use is not statistically significant (the effect of temperature does not depend on previous use).
Example of an Ordinal Logistic Model
If the response variable has an ordinal modeling type, the platform fits the cumulative response probabilities
to the logistic function of a linear model using maximum likelihood. Likelihood-ratio test statistics are
provided for the whole model and lack of fit. Wald test statistics are provided for each effect.
If there is an ordinal response and a single continuous numeric effect, the ordinal logistic platform in Fit Y
by X displays a cumulative logistic probability plot.