In order to study the effects of student-faculty ratio on achievement, a researcher decides to investigate a number of different educational institutions (i.e., colleges and universities).If the researcher categorizes the institutions as either public or private, what type of variable is “institution”?
Question
In order to study the effects of student-faculty ratio on achievement, a researcher decides to investigate a number of different educational institutions (i.e., colleges and universities).If the researcher categorizes the institutions as either public or private, what type of variable is “institution”?
Solution
The variable "institution" in this context is a nominal variable. Nominal variables are categorical variables that have two or more categories, but which do not have an intrinsic order or ranking. In this case, the categories are "public" and "private". These categories do not have a natural order (i.e., one is not inherently better or worse than the other), so the variable is nominal.
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