3.3: Scales of Measurement

• What are the four types of measurement scales?

  1. Nominal
  2. Ordinal
  3. Interval
  4. Ratio
• Nominal Scale

  Tells us that only a difference exists.
• Ordinal Scale

  Tells us the direction of the difference.
• Interval Scale

  Determine the direction and the magnitude of the difference.
• Ratio Scale

  Indicates measurement which allow us to determine the direction, magnitude, and the ratio of the difference.