ON THE PROBLEM OF NONADDITIVITY IN TWO - WAY ANALYSIS OF VARANCE OF DATA FOR COMPARING THE EFFICIENCY OF FISHING GEARS

Abstract

To bring out the relative efficiency of various types of fishing gears, in the analysis of catch data, a combination of Tukey's test, consequent transformqtion and graphical analysis for outlier elimination has been introduced, which can be advantageously used for applying ANOV A techniques, Application of these procedures to actual sets of data showed that nonadditivity in the data was caused by either the presence of outliers, or the absence of a suitable transformation or both. As a corollary, the concurrent model: Xii = μ + αi + βʲ +λαiβ ʲ + Eiʲ adequately fits the data.