Estimating the values of parameters in latent class analysis, one needs to know the number of clusters in advance. It is crucial to determine a criterion which enables confirmation of the superiority of one number of classes over the others. A statistical approach, which is based on a likelihood...

A scale curve is a nonparametric approach to study a dispersion of a random vector around a multivariate median. The scale curve is a volume functional based on probabilities allocated on the so-called central regions induced by a given statistical depth function. The curve expresses a degree of...