Forms for the distribution of ss ilkptxcxtt statistic for bivariate sphericity
Robb J. Muirhead · Communication in Statistics- Theory and Methods · 1976
This paper examines the nonnuU distribution of the ellipticity statistic used for testing sphericity in a bivariate normal population. The distribution function is expressed as mixtures of F distribution functions, where the mixing probabilities are binomial and mgatiire binomial. A simple approximation to the distribution is suggested and examined