Which statement best differentiates nominal from ordinal data scales?

Which statement best differentiates nominal from ordinal data scales?

• A. Nominal data have a meaningful order, and ordinal data do not.
• B. Nominal data have no inherent order, while ordinal data have a meaningful order.
• C. Both scales have equal intervals between values.
• D. All nominal data are measured on a ratio scale.

Answer: (B)

The key idea is how the categories are ordered and labeled. Nominal data simply label categories with no inherent ranking—labels like red/blue, or types of product categories, just distinguish groups without implying which is bigger or smaller. Ordinal data, on the other hand, arrange categories in a meaningful sequence—such as small, medium, large or first, second, third—so there is a defined order. However, with ordinal data, the exact differences between adjacent categories aren’t assumed to be equal or known. That distinction makes the statement accurate: nominal data have no inherent order, while ordinal data have a meaningful order. The other points don’t fit because nominal data don’t imply any ranking, equal intervals aren’t assumed for ordinal data, and nominal data are not measured on a ratio scale.

The key idea is how the categories are ordered and labeled. Nominal data simply label categories with no inherent ranking—labels like red/blue, or types of product categories, just distinguish groups without implying which is bigger or smaller. Ordinal data, on the other hand, arrange categories in a meaningful sequence—such as small, medium, large or first, second, third—so there is a defined order. However, with ordinal data, the exact differences between adjacent categories aren’t assumed to be equal or known.

That distinction makes the statement accurate: nominal data have no inherent order, while ordinal data have a meaningful order. The other points don’t fit because nominal data don’t imply any ranking, equal intervals aren’t assumed for ordinal data, and nominal data are not measured on a ratio scale.