Adding new independent variables to each of the 5 ordinal logistic regression models changed the study results as shown in the attached table, does this mean that these models are not correct? How would these contradicting results be explained?
Well if you changed the data why would you expect the models to have the same estimates?. x: 1, 2, 3; Xbar=2 Y:1,3,5 Ybar=3. Not the same right.? Have you studied regression and statistical sampling? If not Google these terms or ask your instructor.