Statistics for the Behavioral Sciences
Quiz 18: Overview and Extension: Statistical Tests for More Complex Designs
If the Dependent Variable Is Measured on an Ordinal Level
If the dependent variable is measured on an ordinal level that seriously departs from interval level characteristics,a parametric test is always the optimal test.
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A non-parametric test should be pursued if there is reason to believe that the distributional assumptions of the corresponding parametric test have been violated to the extent that the parametric test is not robust.
Generally speaking,parametric methods are not conducive to analyzing qualitative variables.
The appropriate statistical methods for Case III situations are techniques called logistic regression and polychotomous logistic regression.
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