---
url: "https://questionstar.com/principles-of-survey-research/chapter-2/slide-022.html"
title: "Primary Scales of Measurement"
type: "lehrbuch-slide"
chapter: 2
chapterTitle: "Survey: Measurement and Scaling"
slide: 22
---

# Primary Scales of Measurement

*Measurement and Scaling*

Nominal

- Numbers merely serve to classify the objects
- non-continuous scale

7 23 10

Ordinal

- Numbers indicate the relative positions of the objects
- but not the magnitude of the difference between them

Interval

quasi-metric

- Differences between objects can be compared
- zero point arbitrary

Ratio

also metric

- zero point uniquely fixed
- Ratios of the scale values can be computed

---

*Slide 22 of 274 · Chapter 2: Survey: Measurement and Scaling · Principles of Survey Research · Dr. Paul Marx*