A comparison of weighted least square estimation and ordinary least square estimation for analysing weight-length relationship of Por?s Goatfish (Upeneus pori Ben-Tuvia & Golani, 1989) in Iskenderun bay


AKAR M. , GÜNDOĞDU S.

JOURNAL OF APPLIED BIOLOGICAL SCIENCES, vol.7, no.3, pp.46-50, 2013 (Refereed Journals of Other Institutions)

  • Publication Type: Article / Article
  • Volume: 7 Issue: 3
  • Publication Date: 2013
  • Title of Journal : JOURNAL OF APPLIED BIOLOGICAL SCIENCES
  • Page Numbers: pp.46-50

Abstract

A weighted least square (WLS) and ordinary least square (OLS) approach for analysing fish length-weight relationships, was applied. We reviewed and compared two regression methods used in statistics to reconstruct length-weight relationship from Por’s Goatfish (Upeneus pori Ben-Tuvia & Golani, 1989) length-weight data in Iskenderun Bay. This comparison relies on a suite of
regression model verification statistics to validate the accuracy of the length-weight relationship produced by the best model. The results indicate WLS may perform slightly better in heteroscedastic data; conversely, OLS may perform slightly better when the data is homoscedastic