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Chapter 2 · Survey: Measurement and Scaling · Slide 22/274

Primary Scales of Measurement

Measurement and Scaling

2.1 · Introduction Measurement and Scaling

Primary Scales of Measurement


Nominal
  • Numbers merely serve to classify the objects
  • non-continuous scale
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
QUESTIONSTAR · Dr. Paul Marx 22 / 274
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