Levels of Measurement and Descriptive Statistics

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Levels of Measurement and Descriptive Statistics

• Richard Rivera (aka Rico)

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What are the Levels of Measurement?

• Ratio (e.g., lengths, weights, volumes,
  capacities, rates)
• Different categories
• Rankable categories
• Constant equal-sized Intervals
• Absolute Zero (physical significance, the zero
  actually signifies something) (e.g., temperature
  in Kelvin, time)
• Interval (temperature on Celsius and Fahrenheit,
  age)
• Different categories
• Rankable categories
• Constant equal-sized Intervals (can be expressed
  numerically)
• Ordinal (e.g.., dominance hierarchy)
• Different categories
• Categories are rankable
• Nominal (a.k.a. attributes)
• Different categories (e.g.., sex, species,
  phylum, location)

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Presentation of Entire Distribution of a Variable
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Central Tendency and Dispersion
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Central Tendency and Dispersion