Nominal means 'by name' and is used for classification into discrete groups without a measurement within or between categories. This describes which data scale?

• A. Interval data
• B. Ordinal data
• C. Percentile range
• D. Nominal data scale

Answer: (D)

Nominal data labels categories by name and has no measurement between categories. This means items are classified into discrete groups with no inherent order, and only counts or frequencies (and the mode) are meaningful, not arithmetic differences or averages. The description fits nominal data precisely because it emphasizes classification by name with no measurement. Interval data would involve numeric values with equal intervals and arithmetic operations, ordinal data would have order but not equal spacing, and percentile range is a distribution descriptor, not a data scale.