Sample size for estimating mean and coefficient of variation in species of crotalarias

Detalhes bibliográficos
Autor(a) principal: TOEBE,MARCOS
Data de Publicação: 2018
Outros Autores: MACHADO,LETÍCIA N., TARTAGLIA,FRANCIELI L., CARVALHO,JULIANA O. DE, BANDEIRA,CIRINEU T., CARGNELUTTI FILHO,ALBERTO
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Anais da Academia Brasileira de Ciências (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401705
Resumo: ABSTRACT The objective of this study was to determine the sample size necessary to estimate the mean and coefficient of variation in four species of crotalarias (C. juncea, C. spectabilis, C. breviflora and C. ochroleuca). An experiment was carried out for each species during the season 2014/15. At harvest, 1,000 pods of each species were randomly collected. In each pod were measured: mass of pod with and without seeds, length, width and height of pods, number and mass of seeds per pod, and mass of hundred seeds. Measures of central tendency, variability and distribution were calculated, and the normality was verified. The sample size necessary to estimate the mean and coefficient of variation with amplitudes of the confidence interval of 95% (ACI95%) of 2%, 4%, ..., 20% was determined by resampling with replacement. The sample size varies among species and characters, being necessary a larger sample size to estimate the mean in relation of the necessary for the coefficient of variation.
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spelling Sample size for estimating mean and coefficient of variation in species of crotalariasCrotalaria spexperimental precisionnumber of podsresamplingABSTRACT The objective of this study was to determine the sample size necessary to estimate the mean and coefficient of variation in four species of crotalarias (C. juncea, C. spectabilis, C. breviflora and C. ochroleuca). An experiment was carried out for each species during the season 2014/15. At harvest, 1,000 pods of each species were randomly collected. In each pod were measured: mass of pod with and without seeds, length, width and height of pods, number and mass of seeds per pod, and mass of hundred seeds. Measures of central tendency, variability and distribution were calculated, and the normality was verified. The sample size necessary to estimate the mean and coefficient of variation with amplitudes of the confidence interval of 95% (ACI95%) of 2%, 4%, ..., 20% was determined by resampling with replacement. The sample size varies among species and characters, being necessary a larger sample size to estimate the mean in relation of the necessary for the coefficient of variation.Academia Brasileira de Ciências2018-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401705Anais da Academia Brasileira de Ciências v.90 n.2 2018reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/0001-3765201820170813info:eu-repo/semantics/openAccessTOEBE,MARCOSMACHADO,LETÍCIA N.TARTAGLIA,FRANCIELI L.CARVALHO,JULIANA O. DEBANDEIRA,CIRINEU T.CARGNELUTTI FILHO,ALBERTOeng2018-06-08T00:00:00Zoai:scielo:S0001-37652018000401705Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2018-06-08T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false
dc.title.none.fl_str_mv Sample size for estimating mean and coefficient of variation in species of crotalarias
title Sample size for estimating mean and coefficient of variation in species of crotalarias
spellingShingle Sample size for estimating mean and coefficient of variation in species of crotalarias
TOEBE,MARCOS
Crotalaria sp
experimental precision
number of pods
resampling
title_short Sample size for estimating mean and coefficient of variation in species of crotalarias
title_full Sample size for estimating mean and coefficient of variation in species of crotalarias
title_fullStr Sample size for estimating mean and coefficient of variation in species of crotalarias
title_full_unstemmed Sample size for estimating mean and coefficient of variation in species of crotalarias
title_sort Sample size for estimating mean and coefficient of variation in species of crotalarias
author TOEBE,MARCOS
author_facet TOEBE,MARCOS
MACHADO,LETÍCIA N.
TARTAGLIA,FRANCIELI L.
CARVALHO,JULIANA O. DE
BANDEIRA,CIRINEU T.
CARGNELUTTI FILHO,ALBERTO
author_role author
author2 MACHADO,LETÍCIA N.
TARTAGLIA,FRANCIELI L.
CARVALHO,JULIANA O. DE
BANDEIRA,CIRINEU T.
CARGNELUTTI FILHO,ALBERTO
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv TOEBE,MARCOS
MACHADO,LETÍCIA N.
TARTAGLIA,FRANCIELI L.
CARVALHO,JULIANA O. DE
BANDEIRA,CIRINEU T.
CARGNELUTTI FILHO,ALBERTO
dc.subject.por.fl_str_mv Crotalaria sp
experimental precision
number of pods
resampling
topic Crotalaria sp
experimental precision
number of pods
resampling
description ABSTRACT The objective of this study was to determine the sample size necessary to estimate the mean and coefficient of variation in four species of crotalarias (C. juncea, C. spectabilis, C. breviflora and C. ochroleuca). An experiment was carried out for each species during the season 2014/15. At harvest, 1,000 pods of each species were randomly collected. In each pod were measured: mass of pod with and without seeds, length, width and height of pods, number and mass of seeds per pod, and mass of hundred seeds. Measures of central tendency, variability and distribution were calculated, and the normality was verified. The sample size necessary to estimate the mean and coefficient of variation with amplitudes of the confidence interval of 95% (ACI95%) of 2%, 4%, ..., 20% was determined by resampling with replacement. The sample size varies among species and characters, being necessary a larger sample size to estimate the mean in relation of the necessary for the coefficient of variation.
publishDate 2018
dc.date.none.fl_str_mv 2018-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401705
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401705
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0001-3765201820170813
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Academia Brasileira de Ciências
publisher.none.fl_str_mv Academia Brasileira de Ciências
dc.source.none.fl_str_mv Anais da Academia Brasileira de Ciências v.90 n.2 2018
reponame:Anais da Academia Brasileira de Ciências (Online)
instname:Academia Brasileira de Ciências (ABC)
instacron:ABC
instname_str Academia Brasileira de Ciências (ABC)
instacron_str ABC
institution ABC
reponame_str Anais da Academia Brasileira de Ciências (Online)
collection Anais da Academia Brasileira de Ciências (Online)
repository.name.fl_str_mv Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)
repository.mail.fl_str_mv ||aabc@abc.org.br
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