Sample size for detecting significant differences among treatments

Detalhes bibliográficos
Autor(a) principal: Resende, Marcos Deon Vilela de
Data de Publicação: 2004
Outros Autores: Sturion, José Alfredo, Pereira, José Carlos Duarte
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Florestal Brasileira (Online)
Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1590
Resumo: Sample sizes required for the detection of significant differences among experimental treatments in scientific research are presented. An approach based on the magnitude of the coefficient of determination (R2) among treatments was used. The required sample sizes decrease with increase in R2. For detecting true differences with magnitudes of one standard deviation of the trait, the required sample size are 15 to 5 for R2 ranging from 5% to 70%.
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spelling Sample size for detecting significant differences among treatmentsTamanho amostral para detecção de diferenças significativas entre tratamentosEstatística experimentalAmostragemPesquisa científicaExperimental StatisticsSamplingScientific Research.Sample sizes required for the detection of significant differences among experimental treatments in scientific research are presented. An approach based on the magnitude of the coefficient of determination (R2) among treatments was used. The required sample sizes decrease with increase in R2. For detecting true differences with magnitudes of one standard deviation of the trait, the required sample size are 15 to 5 for R2 ranging from 5% to 70%.No presente trabalho são apresentados os tamanhos amostrais adequados à detecção de diferenças significativas entre tratamentos experimentais empregados na pesquisa científica. A abordagem empregada baseia-se na magnitude do coeficiente de determinação (R2) dos efeitos de tratamentos. O tamanho amostral necessário diminui com o aumento do R2 da variável. Para detecção de diferenças de magnitudes equivalente a um desvio padrão da variável, o tamanho amostral necessário varia de 15 a 5 para R2 variando de 5% a 70%.Embrapa Florestas2004-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1590Pesquisa Florestal Brasileira; n. 49 (2004): jul./dez.; 109-120Pesquisa Florestal Brasileira; No. 49 (2004): jul./dez.; 109-1201983-26051809-3647reponame:Pesquisa Florestal Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1590/632Resende, Marcos Deon Vilela deSturion, José AlfredoPereira, José Carlos Duarteinfo:eu-repo/semantics/openAccess2018-03-22T16:21:17Zoai:pfb.cnpf.embrapa.br/pfb:article/1590Revistahttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/PUBhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/oaipfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br1983-26051809-3647opendoar:2018-03-22T16:21:17Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Sample size for detecting significant differences among treatments
Tamanho amostral para detecção de diferenças significativas entre tratamentos
title Sample size for detecting significant differences among treatments
spellingShingle Sample size for detecting significant differences among treatments
Resende, Marcos Deon Vilela de
Estatística experimental
Amostragem
Pesquisa científica
Experimental Statistics
Sampling
Scientific Research.
title_short Sample size for detecting significant differences among treatments
title_full Sample size for detecting significant differences among treatments
title_fullStr Sample size for detecting significant differences among treatments
title_full_unstemmed Sample size for detecting significant differences among treatments
title_sort Sample size for detecting significant differences among treatments
author Resende, Marcos Deon Vilela de
author_facet Resende, Marcos Deon Vilela de
Sturion, José Alfredo
Pereira, José Carlos Duarte
author_role author
author2 Sturion, José Alfredo
Pereira, José Carlos Duarte
author2_role author
author
dc.contributor.author.fl_str_mv Resende, Marcos Deon Vilela de
Sturion, José Alfredo
Pereira, José Carlos Duarte
dc.subject.por.fl_str_mv Estatística experimental
Amostragem
Pesquisa científica
Experimental Statistics
Sampling
Scientific Research.
topic Estatística experimental
Amostragem
Pesquisa científica
Experimental Statistics
Sampling
Scientific Research.
description Sample sizes required for the detection of significant differences among experimental treatments in scientific research are presented. An approach based on the magnitude of the coefficient of determination (R2) among treatments was used. The required sample sizes decrease with increase in R2. For detecting true differences with magnitudes of one standard deviation of the trait, the required sample size are 15 to 5 for R2 ranging from 5% to 70%.
publishDate 2004
dc.date.none.fl_str_mv 2004-12-30
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://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1590
url https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1590
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1590/632
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 Embrapa Florestas
publisher.none.fl_str_mv Embrapa Florestas
dc.source.none.fl_str_mv Pesquisa Florestal Brasileira; n. 49 (2004): jul./dez.; 109-120
Pesquisa Florestal Brasileira; No. 49 (2004): jul./dez.; 109-120
1983-2605
1809-3647
reponame:Pesquisa Florestal 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 Florestal Brasileira (Online)
collection Pesquisa Florestal Brasileira (Online)
repository.name.fl_str_mv Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br
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