Sample size for the estimation of the mean and the coefficient of variation in maize

Detalhes bibliográficos
Autor(a) principal: Toebe, Marcos
Data de Publicação: 2014
Outros Autores: Cargnelutti Filho, Alberto, Burin, Cláudia, Casarotto, Gabriele, Haesbaert, Fernando Machado
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/19744
Resumo: The objective of this work was to determine the necessary sample size to estimate the mean and the coefficient of variation in traits of single, three‑way, and double maize crosses, in different harvests and precision levels, by resampling with replacement. Twelve characters were measured in 361, 373, and 416 plants, respectively, of the single, three‑way, and double‑cross hybrids of the 2008/2009 crop season, and in 1,777, 1,693, and 1,720 plants, respectively, of the single, three‑way, and double‑cross hybrids of the 2009/2010 crop season. Then, descriptive statistics were calculated and the sample size necessary to estimate the mean and coefficient of variation in precision levels – amplitudes of the confidence interval of 95% (AIC95%) of 5, 10, …, 35% of the mean and coefficient of variation – were determined by resampling with replacement. The sample size varied among hybrids, crop seasons, and traits. A larger sample size is necessary to estimate the mean and the coefficient of variation for the double-cross hybrid evaluated in the 2009/2010 crop season. For the same hybrid, crop, trait, and precision level, a larger sample size is necessary to estimate the mean compared to the sample size necessary to estimate the coefficient of variation. The measurement of 325, 150, 80, 60, 35, and 30 plants, respectively, is enough for the estimation of the mean and the coefficient of variation with AIC95% maximum of 10, 15, 20, 25, 30, and 35%, in all hybrids, crops and traits.
id EMBRAPA-4_6f8b19a019ba08064862445a9c09ca89
oai_identifier_str oai:ojs.seer.sct.embrapa.br:article/19744
network_acronym_str EMBRAPA-4
network_name_str Pesquisa Agropecuária Brasileira (Online)
repository_id_str
spelling Sample size for the estimation of the mean and the coefficient of variation in maizeTamanho de amostra para estimação da média e do coeficiente de variação em milhoZea mays; experimental design; resampling; optimum plot sizeZea mays; planejamento experimental; reamostragem; tamanho ótimo de parcelaThe objective of this work was to determine the necessary sample size to estimate the mean and the coefficient of variation in traits of single, three‑way, and double maize crosses, in different harvests and precision levels, by resampling with replacement. Twelve characters were measured in 361, 373, and 416 plants, respectively, of the single, three‑way, and double‑cross hybrids of the 2008/2009 crop season, and in 1,777, 1,693, and 1,720 plants, respectively, of the single, three‑way, and double‑cross hybrids of the 2009/2010 crop season. Then, descriptive statistics were calculated and the sample size necessary to estimate the mean and coefficient of variation in precision levels – amplitudes of the confidence interval of 95% (AIC95%) of 5, 10, …, 35% of the mean and coefficient of variation – were determined by resampling with replacement. The sample size varied among hybrids, crop seasons, and traits. A larger sample size is necessary to estimate the mean and the coefficient of variation for the double-cross hybrid evaluated in the 2009/2010 crop season. For the same hybrid, crop, trait, and precision level, a larger sample size is necessary to estimate the mean compared to the sample size necessary to estimate the coefficient of variation. The measurement of 325, 150, 80, 60, 35, and 30 plants, respectively, is enough for the estimation of the mean and the coefficient of variation with AIC95% maximum of 10, 15, 20, 25, 30, and 35%, in all hybrids, crops and traits.O objetivo deste trabalho foi determinar o tamanho de amostra necessário para a estimação da média e do coeficiente de variação em caracteres de híbridos simples, triplo e duplo de milho, em diferentes safras e níveis de precisão, por reamostragem com reposição. Doze caracteres foram mensurados em 361, 373 e 416 plantas, respectivamente, de híbridos simples, triplo e duplo, na safra 2008/2009, e em 1.777, 1.693 e 1.720 plantas, respectivamente, de híbridos simples, triplo e duplo na safra 2009/2010. Calcularam-se as estatísticas descritivas e determinou-se o tamanho de amostra necessário para a estimação da média e do coeficiente de variação, em diferentes níveis de precisão – amplitudes do intervalo de confiança de 95% (AIC95%) de 5, 10, ..., 35% da média e do coeficiente de variação –, por reamostragem com reposição. O tamanho de amostra variou entre híbridos, safras e caracteres. É necessário maior tamanho de amostra para a estimação da média e do coeficiente de variação no híbrido duplo, avaliado na safra 2009/2010. Para um mesmo híbrido, safra, caractere e nível de precisão, é necessário maior tamanho de amostra para a estimação da média, em relação ao necessário para estimação do coeficiente de variação. A mensuração de 325, 150, 80, 60, 35 e 30 plantas, respectivamente, é suficiente para a estimação da média e do coeficiente de variação com AIC95% máximas de 10, 15, 20, 25, 30 e 35%, em todos os híbridos, safras e caracteres.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCNPq e CAPESToebe, MarcosCargnelutti Filho, AlbertoBurin, CláudiaCasarotto, GabrieleHaesbaert, Fernando Machado2014-12-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/19744Pesquisa Agropecuaria Brasileira; v.49, n.11, nov. 2014; 860-871Pesquisa Agropecuária Brasileira; v.49, n.11, nov. 2014; 860-8711678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/19744/12799https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/19744/11981info:eu-repo/semantics/openAccess2014-12-08T19:09:16Zoai:ojs.seer.sct.embrapa.br:article/19744Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-12-08T19:09:16Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Sample size for the estimation of the mean and the coefficient of variation in maize
Tamanho de amostra para estimação da média e do coeficiente de variação em milho
title Sample size for the estimation of the mean and the coefficient of variation in maize
spellingShingle Sample size for the estimation of the mean and the coefficient of variation in maize
Toebe, Marcos
Zea mays; experimental design; resampling; optimum plot size
Zea mays; planejamento experimental; reamostragem; tamanho ótimo de parcela
title_short Sample size for the estimation of the mean and the coefficient of variation in maize
title_full Sample size for the estimation of the mean and the coefficient of variation in maize
title_fullStr Sample size for the estimation of the mean and the coefficient of variation in maize
title_full_unstemmed Sample size for the estimation of the mean and the coefficient of variation in maize
title_sort Sample size for the estimation of the mean and the coefficient of variation in maize
author Toebe, Marcos
author_facet Toebe, Marcos
Cargnelutti Filho, Alberto
Burin, Cláudia
Casarotto, Gabriele
Haesbaert, Fernando Machado
author_role author
author2 Cargnelutti Filho, Alberto
Burin, Cláudia
Casarotto, Gabriele
Haesbaert, Fernando Machado
author2_role author
author
author
author
dc.contributor.none.fl_str_mv
CNPq e CAPES
dc.contributor.author.fl_str_mv Toebe, Marcos
Cargnelutti Filho, Alberto
Burin, Cláudia
Casarotto, Gabriele
Haesbaert, Fernando Machado
dc.subject.por.fl_str_mv Zea mays; experimental design; resampling; optimum plot size
Zea mays; planejamento experimental; reamostragem; tamanho ótimo de parcela
topic Zea mays; experimental design; resampling; optimum plot size
Zea mays; planejamento experimental; reamostragem; tamanho ótimo de parcela
description The objective of this work was to determine the necessary sample size to estimate the mean and the coefficient of variation in traits of single, three‑way, and double maize crosses, in different harvests and precision levels, by resampling with replacement. Twelve characters were measured in 361, 373, and 416 plants, respectively, of the single, three‑way, and double‑cross hybrids of the 2008/2009 crop season, and in 1,777, 1,693, and 1,720 plants, respectively, of the single, three‑way, and double‑cross hybrids of the 2009/2010 crop season. Then, descriptive statistics were calculated and the sample size necessary to estimate the mean and coefficient of variation in precision levels – amplitudes of the confidence interval of 95% (AIC95%) of 5, 10, …, 35% of the mean and coefficient of variation – were determined by resampling with replacement. The sample size varied among hybrids, crop seasons, and traits. A larger sample size is necessary to estimate the mean and the coefficient of variation for the double-cross hybrid evaluated in the 2009/2010 crop season. For the same hybrid, crop, trait, and precision level, a larger sample size is necessary to estimate the mean compared to the sample size necessary to estimate the coefficient of variation. The measurement of 325, 150, 80, 60, 35, and 30 plants, respectively, is enough for the estimation of the mean and the coefficient of variation with AIC95% maximum of 10, 15, 20, 25, 30, and 35%, in all hybrids, crops and traits.
publishDate 2014
dc.date.none.fl_str_mv 2014-12-08
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/19744
url https://seer.sct.embrapa.br/index.php/pab/article/view/19744
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/19744/12799
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/19744/11981
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.49, n.11, nov. 2014; 860-871
Pesquisa Agropecuária Brasileira; v.49, n.11, nov. 2014; 860-871
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
_version_ 1793416674416787456

Registros relacionados