comparando os métodos paramétrico e não-paramétrico na determinação do valor crítico do teste estatístico de médias proposto por hayter e tsui comparing the parametric and non-parametric methods for the determination of the critical value used in hayter and tsui's statistical test to compare means
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2005
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Abstract
Neste artigo é feita uma comparação dos métodos paramétrico e não-paramétrico para determinação da constante C Ralfa, que é utilizada na proposta de Hayter e Tsui (1994) para controle de qualidade de processos multivariados. O método de Hayter e Tsui é uma alternativa ao T² de Hotelling, com a vantagem que identifica automaticamente quais variáveis são as responsáveis pela falta de controle do processo. Alguns processos multivariados de dimensões p=2 e p=4 foram simulados e os resultados mostraram que o método paramétrico é melhor que o não-paramétrico, mas para amostras de tamanhos maior ou igual a 5000 os dois métodos são equivalentes. Este resultado é contrário ao postulado por Hayter & Tsui, que sugerem que o método não-paramétrico pode ser adotado a partir de amostras de tamanho 500.
In this paper a comparison between the parametric and the non-parametric methods used to find the constant C Ralpha, which is part of the Hayter and Tsui (1994) methodology to control multivariate processes, is presented. The Hayter and Tsui method is an alternative to the Hotelling T²statistical test with the advantage that it identifies automatically which quality characteristic is responsible for the out-of-control situation. Some multivariate processes p=2 and p=4 dimensional were simulated and the results showed that the parametric method was better than the non-parametric one. However, for sample sizes higher ou equal to 5000 they were equivalent. The results go against the Hayter & Tsui's who suggested that the non-parametric method could be adopted for sample sizes higher or equal to 500.
In this paper a comparison between the parametric and the non-parametric methods used to find the constant C Ralpha, which is part of the Hayter and Tsui (1994) methodology to control multivariate processes, is presented. The Hayter and Tsui method is an alternative to the Hotelling T²statistical test with the advantage that it identifies automatically which quality characteristic is responsible for the out-of-control situation. Some multivariate processes p=2 and p=4 dimensional were simulated and the results showed that the parametric method was better than the non-parametric one. However, for sample sizes higher ou equal to 5000 they were equivalent. The results go against the Hayter & Tsui's who suggested that the non-parametric method could be adopted for sample sizes higher or equal to 500.
| Reference Key |
mingoti2005productioncomparando
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|---|---|
| Authors | ;Sueli Aparecida Mingoti;Fernando Augusto Alves Glória |
| Journal | Neotropical entomology |
| Year | 2005 |
| DOI |
10.1590/S0103-65132005000200009
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| URL | |
| Keywords | Keywords not found |
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