Avaliação do coeficiente de variação como medida de precisão em experimentos com frangos de corte

Abstract

Coefficient of variation (CV) is a measure of dispersion that enables the comparison, of the same characteristics, between data sets from different studies. The purpose of the study was to establish CV bands which can guide the evaluation of each variable in future experiments. Coefficients of variation were taken from several researches published in Brazil, with emphasis on broilers performance and their most studied characteristics, such as weight gain, feed consumption, feed:weight gain ratio, mortality, viability, body weight and yields of carcass, breast, legs, abdominal fat, wings and back. Based on relations between the median (Md) and pseudosigma (PS), a table was created with suggested intervals for the cited parameters. Larger coefficient of variation intervals were observed for abdominal fat yield. The other variables showed relatively low CV interval bands