When a researcher is interested in measuring whether two groups differ on their responses to an ordinal variable, which test is the apt one to be used? Provide an example.
What will be an ideal response?
Ans: Mann–Whitney U test as this is a statistic for determining whether there is a significant relationship between a dichotomous nominal variable and an ordinal variable when the data are drawn from independent samples. In other words, this statistic will tell you whether two groups differ on their responses to an ordinal variable. An example: A researcher interested in determining whether students and professors differ on their level of agreement on a five-point ordinal scale on the statement “student participation in university government enriches the learning environment.” The Mann–Whitney U test calculates a value for U by arranging all subjects in rank order according to their scores on the ordinal variable and then examining the sequence in which these scores represent people drawn from Group A (Students) and from Group B (Professors).
Cognitive Domain: Application
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