Methods for classifying coefficients of  variation in experimentation with poultrys

Ferreira, Ana Alice Salmito Noleto de Campos; Dourado, Leilane Rocha Barros; Biagiotti, Daniel; Santos, Natanael Pereira da Silva; Nascimento, Daphinne Cardoso Nagib; Sousa, Katiene Regia Silva

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dc.creator	Ferreira, Ana Alice Salmito Noleto de Campos
dc.creator	Dourado, Leilane Rocha Barros
dc.creator	Biagiotti, Daniel
dc.creator	Santos, Natanael Pereira da Silva
dc.creator	Nascimento, Daphinne Cardoso Nagib
dc.creator	Sousa, Katiene Regia Silva
dc.date	2019-01-04
dc.date.accessioned	2023-03-30T19:35:06Z
dc.date.available	2023-03-30T19:35:06Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/2619
dc.identifier	10.14295/cs.v9i4.2619
dc.identifier.uri	https://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/246781
dc.description	The aim of this work was to evaluate the coefficient of variation (CV) and to establish classification ranges for the main variables evaluated in experimentation with poultrys through different methods. The CV data of different response variables observed in poultry articles (broilers, laying hens, roosters and quails) published in five national journals were tabulated in a Microsoft Excel 2010® worksheet. Afterwards, they were subjected to normality evaluation through the Shapiro-Wilk method, and later the following data of the descriptive statistics were utilized: maximum value, minimum value, range, mean, median, standard deviation, midquartile, first quartile, third quartile, interquartile range, and pseudo sigma. According to the values obtained in the descriptive statistics of the CVs of each variable, classification ranges were elaborated for these values, considering six different forms of classification, adapted from the consulted literature. The results indicated that the classification ranges established for CVs in experiments with poultrys are different from those recommended in statistical textbooks. It is possible to utilize midquartile, pseudo sigma, mean and standard deviation through different methods in order to classify the CVs, but the use of the standard deviation promotes incoherent classifications in certain variables, and promotes increase in the amplitude between the lowest and the highest CV value obtained for the classification ranges.	en-US
dc.description	The aim of this work was to evaluate the coefficient of variation (CV) and to establish classification ranges for the main variables evaluated in experimentation with poultrys through different methods. The CV data of different response variables observed in poultry articles (broilers, laying hens, roosters and quails) published in five national journals were tabulated in a Microsoft Excel 2010® worksheet. Afterwards, they were subjected to normality evaluation through the Shapiro-Wilk method, and later the following data of the descriptive statistics were utilized: maximum value, minimum value, range, mean, median, standard deviation, midquartile, first quartile, third quartile, interquartile range, and pseudo sigma. According to the values obtained in the descriptive statistics of the CVs of each variable, classification ranges were elaborated for these values, considering six different forms of classification, adapted from the consulted literature. The results indicated that the classification ranges established for CVs in experiments with poultrys are different from those recommended in statistical textbooks. It is possible to utilize midquartile, pseudo sigma, mean and standard deviation through different methods in order to classify the CVs, but the use of the standard deviation promotes incoherent classifications in certain variables, and promotes increase in the amplitude between the lowest and the highest CV value obtained for the classification ranges.	pt-BR
dc.format	application/pdf
dc.language	eng
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/2619/593
dc.rights	Copyright (c) 2019 Ana Alice Salmito Noleto de Campos Ferreira, Leilane Rocha Barros Dourado, Daniel Biagiotti, Natanael Pereira da Silva Santos, Daphinne Cardoso Nagib Nascimento	en-US
dc.source	Comunicata Scientiae; Vol. 9 No. 4 (2018); 565-574	en-US
dc.source	Comunicata Scientiae; v. 9 n. 4 (2018); 565-574	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.title	Methods for classifying coefficients of variation in experimentation with poultrys	en-US
dc.title	Methods for classifying coefficients of variation in experimentation with poultrys	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion