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The likelihood ratio test for goodness of fit with fuzzy experimental observations

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3 Author(s)
Gil, M.A. ; Dept. of Math., Oviedo Univ., Spain ; Corral, N. ; Casals, M.R.

Experiments are considered in which the person responsible for observation cannot crisply perceive the outcomes, but where each observable event can be identified with a fuzzy subset of the sample space. It is explained that in such a situation, the likelihood ratio test can immediately be derived for goodness of fit to a completely specified hypothetical distribution regarding the `exact experiment' on the basis of fuzzy information. On the other hand, if the hypothetical distribution involves unknown parameters the extension of the likelihood ratio test usually becomes unmanageable, because of the unoperativeness of the trivial generalization of the maximum likelihood principle to fuzzy observations. This last generalization is suitably approximated by means of the minimum inaccuracy principle of point estimation (introduced in previous papers as an operative extension of the maximum likelihood one, on the basis of the inaccuracy measure defined by D.F. Kerridge in 1961) whose use for the likelihood-ratio test for goodness of fit with fuzzy data provides a manageable procedure

Published in:

Systems, Man and Cybernetics, IEEE Transactions on  (Volume:19 ,  Issue: 4 )

Date of Publication:

Jul/Aug 1989

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