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Which of the following is the most similar ?

  • A.Nominal, ratio and interval data
  • B.Ordinal, nominal and ratio data
  • C.Ordinal, interval and ratio data
  • D.Nominal, ordinal and ratio data

Answer: C

The most similar group is ordinal, interval and ratio data.

All three of these scales have order: values can be ranked from less to more. Interval and ratio data also have equal intervals, and ratio data a true zero, but all three share the property of order.

Nominal data only names categories (such as gender or sport), with no order at all. Each of the other options mixes nominal data with ordered scales, so its members are less alike.

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