COEFFICIENTS OF VARIATION FOR NOMINAL AND ORDINAL CATEGORICAL-DATA

Various measures of variation for categorical data which have been introduced suffer from the limitation that their numerical values generally appear to be unreasonable. This may cause their use to give misleading results and poor data discrimination. In this paper, two coefficients of variation for categorical data which seem to have appropriate numerical properties are introduced. One of the coefficients is appropriate for nominal data and one for ordinal data.