Which data type assigns objects to categories that have no numerical properties?

Which data type assigns objects to categories that have no numerical properties?

• A. Ordinal scale
• B. Interval scale
• C. Nominal scale
• D. Ratio scale

Answer: (C)

Nominal scales classify objects into categories that have no numerical properties. The categories are just labels—no inherent order or magnitude. Examples include blood type, gender, or hair color. Because there’s no natural ordering or meaningful distance between categories, you can count how many fall into each category or identify the most frequent category, but you cannot perform arithmetic or compare sizes between categories. This differs from ordinal scales, which impose an order; interval scales, which have equal spacing but no true zero; and ratio scales, which have a true zero and allow meaningful ratios.

Nominal scales classify objects into categories that have no numerical properties. The categories are just labels—no inherent order or magnitude. Examples include blood type, gender, or hair color. Because there’s no natural ordering or meaningful distance between categories, you can count how many fall into each category or identify the most frequent category, but you cannot perform arithmetic or compare sizes between categories. This differs from ordinal scales, which impose an order; interval scales, which have equal spacing but no true zero; and ratio scales, which have a true zero and allow meaningful ratios.