DISPERSION MEASURES AND ANALYSIS FOR FACTORIAL DIRECTIONAL-DATA WITH REPLICATES

Determining the nature of the connection between a number of factors a nd the spread of a directional response in industrial experiments has not been considered much in the literature. Several dispersion measure s are explored and their relationships described. The circular varianc e is a good dispersion measure that transforms the angular dispersion into a statistic measured on a linear scale. Once this transformation has been performed, established techniques for analysis can be employe d for analysing factor influences on the directional dispersion. The m ethod proposed is used to analyse data from an experiment involving th e balancing of automotive flywheels.