✍ 01: Data & Attribute Types — Exercise¶
Tip
Practice — try each question first, then expand the answer to check your reasoning.
Work through each question, then click ▶ Show answer to check yourself. Review the notes if you get stuck.
🔹 Q1. What is the most appropriate measurement scale for university students' letter grades (A, B, C, D, F)?¶
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**Ordinal scale** — grades have a clear order (A > B > C > D > F), but the differences between grades are not numerically measurable.🔹 Q2. What scale describes the level of urgency in a hospital emergency room (low, moderate, high, critical)?¶
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**Ordinal scale** — urgency levels are ranked from low to critical, but the intervals between levels are not measurable quantities.❓ Q3. What scale describes the classification of animals in a zoo (mammal, bird, reptile, ...)?¶
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**Nominal scale** — animal classes are categories with no natural ordering between them.❓ Q4. What scale describes carbon dioxide levels in the atmosphere (measured in ppm)?¶
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**Ratio scale** — CO₂ concentration is numeric, has a true zero (no CO₂), and ratios are meaningful (400 ppm is twice as much as 200 ppm).📍 Q5. What scale describes the distance from a building to the center of campus?¶
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**Ratio scale** — distance is numeric, has a true zero, and ratios are meaningful (200 m is twice as far as 100 m). **Recap — the 4 scales in order of increasing information:** | Scale | Order? | Equal intervals? | True zero? | | --- | --- | --- | --- | | Nominal | No | No | No | | Ordinal | Yes | No | No | | Interval | Yes | Yes | No | | Ratio | Yes | Yes | Yes |📚 All Exercises · Next: Chapter 02 — Descriptive Statistics ➡️