A Note on Classifying Ordinal-Scale Data

In their paper on classifying interval-scale and ordinalscale univariate data, Bryson and Phillips (1974) show that the use of a simple rule, known to be approximately optimal for interval-scale data, is also nearly optimal for ordinal-scale data. Here optimality is defined in terms of the amount of information lost by the classification rule. The primary purpose of this note is to point out that…