On the problem of nonadditivity in two-way analysis of variance of data for comparing the efficiency of fishing gears
On the problem of nonadditivity in two-way analysis of variance of data for comparing the efficiency of fishing gears
Date
1984
Authors
Nair, A.K.K.
Alagaraja, K.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists(India),Cochin
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 transformation and graphical analysis for outlier elimination has been introduced, which can be advantageously used for applying ANOVA 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: X sub(ij) = mu + proportional to sub(i) + beta dj + lambda alpha sub(i) beta sub(j) + epsilon sub(ij) adequately fits the data.
Description
Keywords
Fishing gears, mathematical models, gear selectivity
Citation
Fisheries Technology 1984: 21(1), 75-79