Which scale of measurement classifies observations into categories without assigning them a meaningful order?
Correct answer: A. Nominal scale
- A. Nominal scale
- B. Ordinal scale
- C. Interval scale
- D. Ratio scale
Explanation
A nominal scale labels categories such as blood group or province, but its categories have no natural ranking. Ordinal data have an order, whereas interval and ratio scales also support numerical differences.
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About Data Collection and Presentation
Data collection covers primary and secondary sources, qualitative and quantitative data, discrete and continuous variables, sampling methods and questionnaire design. Presentation includes frequency tables, grouped data, bar charts, histograms, pie charts, line graphs and cumulative frequency curves, with care over class intervals and misleading scales.
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