Uso de alguns estimadores ridge na análise estatística de experimentos em entomologia

• Autor(a) principal: Pereira, Gislene Araujo
• Data de Publicação: 2014
• Outros Autores: Milani, Letícia Lima, Cirillo, Marcelo Ângelo
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/39125
• topic: Multicolinearidade; Tamanho amostral; Modelos de regressão; Multicollinearity; Sample size; Regression models

A large number of experiments in agronomic sciences use variables that may give rise to problems of multicollinearity.About the applicability of regression models, the problem of multicollinearity results mainly in increased standarderror, thus, the Student’s t-value is reduced, affecting the inferential results. Many actions are proposed in the literatureto solve the problems of multicollinearity, however, the performance of these measurements are subject to the degreethat multicollinearity of the variables may present, as well as the sample size. To address this problem, this paper aimsto evaluate some ridge estimators using the Monte Carlo’s simulation and demonstrate their application using real datafrom an entomological experiment. The ridge estimators evaluated were effective, in comparison with the least squaresestimator. The results showed that the ridge estimators evaluated can be applied to experimenst that consider thevariables with different degrees of multicollinearity, for samples greater than n=50.