Levels of measurements

• What are the 3 types of Levels of measurements?

  • Nominal: Data that can be categorized (e.g., blue/brown/green eyes)
  • Ordinal: Data ranked in order (e.g., height, age)
  • Interval: A scale where the difference between 2 values are always the same (e.g., age, time, temperature)
• What is a strength and limitation of nominal data?


  +Easy to use

  -Limited categories
• What is a strength and limitation of ordinal data?

  +More detailed than nominal

  -Differences may not be the same
• What is a strength of interval data?

  +More detail than ordinal