Before revision: As Luce (1997, p. 395) wrote: Comparison Incremental progress Measure property Mathematical operators Advanced operations Central tendency Variability Nominal Classification, membership =, ≠ Grouping Mode Qualitative variation Ordinal Comparison, level >, < Sorting Median Range, interquartile range Interval Difference, affinity +, − Comparison to a standard Arithmetic mean Deviation Ratio Magnitude, amount ×, / Ratio Geometric mean, harmonic mean Coefficient of variation, studentized range Nominal level The nominal type differentiates between ].
After revision: As Luce (1997, p. 395) wrote: Comparison Incremental progress Measure property Mathematical operators Advanced operations Central tendency Variability Nominal Classification, membership =, ≠ Grouping Mode Qualitative variation Ordinal Comparison, level >, < Sorting Median Range, interquartile range Interval Difference, affinity +, − Comparison to a standard Arithmetic mean Deviation Ratio Magnitude, amount ×, / Ratio Geometric mean, harmonic mean Coefficient of variation, studentized range Nominal level A nominal scale consists only of a number of distinct classes or categories, for example:Cat, Dog, Rabbit ].