생물학적 계측치의 임의 변동에 관한 추계학적고찰

Abstract

Author showed both theoretical background and experimental results of the three statistical methods in estimating the number of E, Coli aerogeneic group in water per unit volume, and compared the results of these three methods. 1) On the basis of theoretical process, author prepared the practically convenient "quick reference" graphs, Fig. 1 & 1', Fig. 2, and Fig. 3,. showing the average number of Micro-organisms per unit volume as a function of the value obtained from the experimental results, and the 95%confidence interval of the estimators. 2) Experimental results showed that the comparative size of variability of each estimator derived from Colony Counting methods, MPN method and S·K method were in following order: MPN>S-K>Colony Counting. From this follows: the statistical efficiencies of these three estimator would look like this. Colony counting>S-K>MPN This indicated that the experimental results were in general agreement with theory. 3) Finally referring to the weights of both statistical efficiency and technical convenience, the Spearman Karber method were recommended as the good estimation.