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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Soja. |
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Data corrente: |
26/09/1996 |
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Data da última atualização: |
26/09/1996 |
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Autoria: |
VIVALDI, L. J. |
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Título: |
Models and designs for three-treatment, two-period crossover studies |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Raleigh: North Carolina State Universitym 1982, |
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Páginas: |
153p. |
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Idioma: |
Inglês |
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Notas: |
PhD. Thesis. |
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Conteúdo: |
By-period linear full-rank models are presented for the complete three-treatment, two-period crossover design according to four methods of definition of parameters.; The definition of the parameters of interest (main effects and carryover effects) in models without sequence effects is shown to be equivalent to the definition of the corresponding parameters in models with sequence effects, when sequence effects are considered to be zero.; For aspects of subdesigns are studied: (1) definition of the parameters, (2) robust subdesigns with respect to the loss of one or more cells, (3) optimality in subdesigns and (4) behavior of the power of the tests in subdesigns compared to that in the complete design for the same tests.; Using three variance criteria of optimality, the study showed that there is no subdesign that is uniformly optimum with respect to all criteria and all sets of parameters.; The behavior of the F-tests in subdesigns for testing the three important hypotheses was studied by using the noncentrality ratio (NR) between each subdesign and the complete design, when both are balanced and have the same number of observations.; By examining the range of the noncentrality ratio, it was shown that no subdesign has uniformly greater power for all three hypotheses than the complete design, and that, in some classes of subdesigns, for a specific hypothesis, the complete design is uniformly better than the subdesigns. However, in many cases, subdesigns can be better than the complete design, depending on the value of the parameter. MenosBy-period linear full-rank models are presented for the complete three-treatment, two-period crossover design according to four methods of definition of parameters.; The definition of the parameters of interest (main effects and carryover effects) in models without sequence effects is shown to be equivalent to the definition of the corresponding parameters in models with sequence effects, when sequence effects are considered to be zero.; For aspects of subdesigns are studied: (1) definition of the parameters, (2) robust subdesigns with respect to the loss of one or more cells, (3) optimality in subdesigns and (4) behavior of the power of the tests in subdesigns compared to that in the complete design for the same tests.; Using three variance criteria of optimality, the study showed that there is no subdesign that is uniformly optimum with respect to all criteria and all sets of parameters.; The behavior of the F-tests in subdesigns for testing the three important hypotheses was studied by using the noncentrality ratio (NR) between each subdesign and the complete design, when both are balanced and have the same number of observations.; By examining the range of the noncentrality ratio, it was shown that no subdesign has uniformly greater power for all three hypotheses than the complete design, and that, in some classes of subdesigns, for a specific hypothesis, the complete design is uniformly better than the subdesigns. However, in many cases, subdesigns can be better than th... Mostrar Tudo |
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Palavras-Chave: |
Análise estatítica; Modelo. |
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Thesagro: |
Análise Estatística; Estatística. |
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Thesaurus Nal: |
design; models; statistical analysis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02144nam a2200217 a 4500
001 1556442
005 1996-09-26
008 1982 bl uuuu m 00u1 u #d
100 1 $aVIVALDI, L. J.
245 $aModels and designs for three-treatment, two-period crossover studies
260 $aRaleigh: North Carolina State Universitym 1982,$c1982
300 $a153p.
500 $aPhD. Thesis.
520 $aBy-period linear full-rank models are presented for the complete three-treatment, two-period crossover design according to four methods of definition of parameters.; The definition of the parameters of interest (main effects and carryover effects) in models without sequence effects is shown to be equivalent to the definition of the corresponding parameters in models with sequence effects, when sequence effects are considered to be zero.; For aspects of subdesigns are studied: (1) definition of the parameters, (2) robust subdesigns with respect to the loss of one or more cells, (3) optimality in subdesigns and (4) behavior of the power of the tests in subdesigns compared to that in the complete design for the same tests.; Using three variance criteria of optimality, the study showed that there is no subdesign that is uniformly optimum with respect to all criteria and all sets of parameters.; The behavior of the F-tests in subdesigns for testing the three important hypotheses was studied by using the noncentrality ratio (NR) between each subdesign and the complete design, when both are balanced and have the same number of observations.; By examining the range of the noncentrality ratio, it was shown that no subdesign has uniformly greater power for all three hypotheses than the complete design, and that, in some classes of subdesigns, for a specific hypothesis, the complete design is uniformly better than the subdesigns. However, in many cases, subdesigns can be better than the complete design, depending on the value of the parameter.
650 $adesign
650 $amodels
650 $astatistical analysis
650 $aAnálise Estatística
650 $aEstatística
653 $aAnálise estatítica
653 $aModelo
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 53 | |
| 11. |  | MENEZES, D. M. de; PINTO, M. M.; VIVALDI, L. J. Estudo da temperatura do solo com e sem cobertura, a diversas profundidades. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 8, n. 6, p. 39-51, 1973. (Agronomia). Título em inglês: A study of soil temperature at different depths with three surface treatments.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 15. | | PRIMAVESI, A. C.; PRIMAVESI, O.; CANTARELLA, H.; GODOY, R.; VIVALDI, L. J. Adubação de aveia em dois sistemas de plantio. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 37, n. 12, p. 1773-1778, dez. 2002 Título em inglês: Oat fertilization in two planting systems.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 19. | | SILVA, D. B. da; CHARCHAR, M. J. D'.; VIVALDI, L. J. Efeito do tratamento de sementes sobre a emergencia de plantulas de trigo e de cevada em duas profundidades de semeadura. Pesquisa Agropecuaria Brasileira, v.28, n.3, p.303-311, 1993. Trabalho apresentado na 16a. Reuniao Nacional de Pesquisa de Trigo, Dourados, MS, 1991.| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 53 | |
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