Vita e Pensiero
Campionamento per popolazioni rare ed elusive: la matrice dei profili
digital
Year:
2003
We have compared four methods (center sampling, multiple frame, network and adaptive sampling) usually proposed for samples drawn from rare and/or elusive populations, for which we haven’t a frame or, if we have, is incomplete.
Distributive Compensation Ratio Derived from the Decomposition of the Mean Difference of a Sum
digital
Year:
2003
In this paper a distributive compensation index, based on the decomposition of the mean difference of a sum Y of the k variates X1, … , Xi, … , Xk , has been proposed.
Su una modifica dell’indice di corrispondenza semplice utilizzato nelle analisi multidimensionali di dati qualitativi
digital
Year:
2004
In multidimensional analysis for qualitative data a similarity and/or dissimilarity matrix is commonly used.
Il problema della migliore combinazione delle osservazioni da Galileo a Subbotin
digital
Year:
2003
In this paper it is sketched a brief historical picture of the proposals presented in the old statistical literature on the methods to combine opportunely observations with random errors.
Verifiche d’ipotesi su medie aritmetiche ponderate dei parametri di una variabile casuale multinomiale
digital
Year:
2003
In this work the hypothesis testing problem that a weighted mean of the probabilities of a multinomial distribution does not exceed a target value, with unilateral alterative will be studyed.
Finite and Asymptotic Properties of a Nonparametric Test for Randomness against Serial Dependence1
digital
Year:
2003
In this paper the use of a nonparametric measure of serial dependence, based on Gini's cograduation index, is discussed.
Metodi per la costruzione di indicatori della qualità del lavoro:
un’applicazione al settore dei servizi sociali
digital
Year:
2003
This paper takes into account the possibilities of the optimal scaling algorithm Princals ( principal component analysis by means of alternating least squares). This algorithm simultaneously gives both a measure of ordered answer categories and a weight referring to the importance to be attributed to each item.
Analisi della qualità di un servizio: un confronto tra scale mediante il modello di Rasch
digital
Year:
2003
Evaluation of the quality of a services involves all the difficulties one typically meets when try to measure an abstract concept: quality is an hidden, directly unobservable, meaning-needed aspect of a service. In this paper we consider a possible solution in efforts to measure quality, the use of Rasch Model in client satisfaction analysis.
Rank-based diagnostics for the
integration order of a VAR solution
digital
Year:
2003
This paper, further developing Faliva and Zoia‘s approach to the derivation of representation theorems (2002 a,b; 2003), sheds new light onto the intriguing mechanism linking the coefficient matrices of the VAR-polynomial expansion about a unit root, with the integration order of the out- coming process.
La relazione tra volumi di apertura ed intensità delle contrattazioni nel mercato finanziario: introduzione di un fattore di smorzamento nel modello ACD giornaliero
digital
Year:
2003
The feature of ultra-high frequency data is accounted for in this paper, where a refined version of the d-ACD model, called d-ACDλ , introduces a smoothing factor on open volumes.
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