Alessandro Zini

Nella prima parte del libro si dà soluzione al problema della cosiddetta “analisi del demerito” nell’ambito del controllo statistico della qualità; la seconda parte è dedicata allo studio della distribuzione binomiale trivariata, modello “naturale” per problemi a prove dicotomiche ripetute.

In this paper, the performances in fitting incomes of three different mixtures of Polisicchio distributions are compared...

In this note a generalisation of the bipolar mean, recently introduced in the literature by Maffenini and Zenga (2005), is presented and discussed. It seems interesting in those contexts, where the categories of an ordinal variable are to be thought as ‘‘non equidistant’’, like in some problems in the customer satisfaction analyses. It is pointed out that the particular bipolar mean chosen for a problem can modify the ‘‘ordering’’ among the frequency distributions with fixed sum N.

This work presents a continuous characters classification tecnique, which satisfies some optimality criterion, such as the maximisation of the variance “between” or the minimisation of the concentration “within” the groups, measured by some index which admits a decomposition.