Which statement best describes a nominal scale?

• A. It uses numeric values with a true zero point
• B. It ranks data where intervals are equal
• C. It has ordered categories with equal spacing
• D. It consists of qualitative categories that are mutually exclusive and have no inherent order

Answer: (D)

Nominal scales categorize data into qualitative groups that have no inherent order. The categories are simply labels that are mutually exclusive and do not carry rank or measurable distance between them. Because there’s no meaningful order or spacing, the data are not arithmetic—you’d typically describe them with frequencies or the mode rather than averages.

The alternative descriptions imply some form of order or distance between categories, which isn’t present in nominal data. A true zero and arithmetic operations point to ratio scales, while ordered categories with equal spacing align with interval or ratio concepts, not nominal.