摘要：Investigation of the expert knowledge was carried out on the sample of 10 experts in the area of water polo. The condition which they have to accomplish was that they are graduated in kinesiology, ex First division players, and actual water polo trainers with remarkable experience. The sample of variables consists of two anthropometric variables (weight (TT) and high (TV) as well as nine combinations of the same anthropometric variables in modalities: under average, average and over average. Measuring of anthropometrical variables, physical weight (TT) and physical height (TV), was implemented to the sample of 89 Croatian first division water polo players in the year 2000. Statistics of two anthropometric variables was calculated. The test for distributions normality was carried out by Kolmogorov-Smirnova (MaxD) procedure. Frequencies of expert opinion and real measuring and recorded state, was calculated. By implementation of the cluster analysis under the K-mean cluster proceeding entities are reorganized in the three prescribed groups, separately for physical height and physical weight. The frequencies of entities were established in separate groups (over average, average and under average in physical height and physical weight). In combination of the height and weight frequency of entities for each of 9 potential combinations of the chosen anthropometrical model was established. By means of χ2-test we analyzed: connections/differences in affiliation of defined anthropometrical model to certain player’s role, connections/differences of the expert opinion about appurtenance of defined anthropometrical model to certain player’s role and connections/differences of the experts' opinion about affiliation of given anthropometrical model to certain player’s role and de facto belonging at that position. Hypothesis, that exists' correlation between experts opinion, anthropometrical models and players roles assigned on the base of the real measured state next to water polo players, are partially confirmed in this investigation. It is affirm that experts statistically significant differentiate five players’ positions (role in the game) on the base designated anthropometric models. Considerable degrees of connection between expert’s opinion and exactly measured anthropometric variables are noted for player’s roles: centre forward, external attacker and guard. Positions (roles) wing and goalkeeper statistically significant differentiates from expert’s opinion. Mentioned significant differences can be explained in two manners. Either experts have not adequate proficiency therefore did not estimate well two positions (wing and goalkeeper), what is slightly possible, either, in the selections process till sports specialization, trainers in Croatia first water polo division disposed with small and inadequate sample or selection was not created as the profession requested. It seems that inadequate imputed sample and subsequently constrained selection exactly give assigned results.
关键词：Key words: water polo; nonparametric statistics; expert systems; anthropometric models
