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About data type

Updated: 4/28/2022
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14y ago

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There are three types of data as followed in the corresponding order in their hierarchy:

  1. Interval data
    • Values are real numbers
    • all calculations are valid
    • can be treated as ordinal or nominal
  2. Ordinal data
    • Values must be represent the ranked order or the data
    • calculations based on the ordering process are valid
    • can be treated as nominal but not interval
    • Example: A rating scale where 1 represents Poor performance; 2 represents fair performance; 3 represents good performance; etc,
    • Values are the arbitrary numbers that represent categories
    • only calculationsn based on the frequencies of occurance are valid
    • cannot be treated as ordinal or interval
    • Example: 1 represents green; 2 represents red; 3 represents orange; (their average means nothing; the only numeric values that you can get is the count of how often it occurs)
  3. Nominal Data
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