Abstract
Statistical data including personal subjectivity or vagueness can be regarded as fuzzy observations. The treatment for the fuzzy observations was developed by Okuda, et al. In this fuzzy observation model, concerning the identification of membership functions, it is impossible to apply the conventional subjective methods because the membership functions must be restricted so that the frequencies of fuzzy data accord with the population distribution. In this paper, a method of identifying the membership functions based on fuzzy observation data is presented.
