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Fuzzy Sets and Systems
Volume 157, Issue 3, 1 February 2006, Pages 319-340
 
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doi:10.1016/j.fss.2005.07.007    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2005 Elsevier B.V. All rights reserved.

Inferring a possibility distribution from empirical data

Marie-Hélène Massona, b, Corresponding Author Contact Information, E-mail The Corresponding Author and Thierry Denœuxb

aUniversité de Picardie Jules Verne, France bUniversité de Technologie de Compiègne, UMR CNRS 6599 Heudiasyc, BP 20529, F-60205 Compiègne cedex, France

Received 8 July 2004; 
revised 28 April 2005; 
accepted 22 July 2005. 
Available online 26 August 2005.

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Abstract

Several transformations from probabilities to possibilities have been proposed. In particular, Dubois and Prade's procedure produces the most specific possibility distribution among the ones dominating a given probability distribution. In this paper, this method is generalized to the case where the probabilities are unknown, the only information being a data sample represented by a histogram. It is proposed to characterize the probabilities of the different classes by simultaneous confidence intervals with a given confidence level 1-α. From this imprecise specification, a procedure for constructing a possibility distribution is described, insuring that the resulting possibility distribution will dominate the true probability distribution in at least 100(1-α)% of the cases. Finally, a simple efficient algorithm is given which makes the computations tractable even if the number of classes is high.

Keywords: Probability–possibility transformation; Possibility theory; Statistics; Multinomial confidence regions; Simultaneous confidence intervals


Fuzzy Sets and Systems
Volume 157, Issue 3, 1 February 2006, Pages 319-340
 
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