3. Categorizing people as either republicans or democrats represents a(n) scale.

A. interval

B. nominal

C. ordinal

D. ratio

4. Which of the following levels of measurement is distinguished by having an absolute zero?

A. interval

B. ratio

C. nominal

D. ordinal

A difference between scores of 3 and 4 on a rating scale that goes from 1 to 16 is about the same as a difference between scores of 15 and 16. The variable has an _____ level of measurement.

A. nominal

B. ordinal

C. interval

D. differential