Bootstrap Confidence Intervals
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Resultado de una estrategia de recordatorios previos y posteriores a la fecha de vacunación para mejorar la oportunidad de la vacunación a los seis meses
Resumo: O impacto da imunização depende de quais vacinas se aplicaram no momento oportuno, característica ainda mais relevante nas crianças. As estratégias bem sucedidas para melhorar a oportunidade incluem o uso de registros nominalizados e mecanismos de monitoramento. Neste estudo foi avaliado o resultado da utilização de avisos prévios, e posterio
Cad. Saúde Pública. Publicado em: 28/11/2019
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2. GEOSTATISTICAL MODELING OF SOYBEAN YIELD AND SOIL CHEMICAL ATTRIBUTES USING SPATIAL BOOTSTRAP
ABSTRACT The goal of this study was to use the spatial bootstrap method to model the spatial dependence structure of soybean yield and soil chemical attributes in an agricultural area. The study involved developing confidence intervals in probability plots to determine the probability distributions assumed by the data; determine the empirical distributions o
Eng. Agríc.. Publicado em: 19/06/2019
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3. A new class of lifetime models and the evaluation of the confidence intervals by double percentile bootstrap
Abstract: In this paper, we introduce a new three-parameter distribution by compounding the Nadarajah-Haghighi and geometric distributions, which can be interpreted as a truncated Marshall-Olkin extended Weibull. The compounding procedure is based on the work by Marshall and Olkin 1997. We prove that the new distribution can be obtained as a compound model w
An. Acad. Bras. Ciênc.. Publicado em: 08/04/2019
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4. Two-Dimensional Numerical Model of the Fracture Process in Steel Fibre Reinforced Concrete with the Continuum Strong Discontinuity Approach and Functional Data Analysis
Abstract This paper presents the formulation of a two-dimensional numeri-cal model able to describe the fracture process in structural mem-bers of steel fibre reinforced concrete (SFRC) from the volume ratio of the fibres and the mechanical properties of the compo-nents: a concrete matrix and a set of steel fibres with a random orientation. The relationship
Lat. Am. j. solids struct.. Publicado em: 08/04/2019
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5. Estimating Sample Size of Soil Cone Index Profiles by Bootstrapping
ABSTRACT Measurements of the soil cone index are widely used to assess soil resistance to root penetration (SR) and to monitor the soil compaction status of agricultural fields. However, soil sampling for SR estimation is a rather challenging task in view of the high spatial and temporal variability of the soil. This study proposed a bootstrapping method to
Rev. Bras. Ciênc. Solo. Publicado em: 17/11/2017
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6. Parametrization of the Davis Growth Model using data of crossbred Zebu cattle
ABSTRACT: The system of differential equations proposed by Oltjen et al. [1986, named Davis Growth Model (DGM)] to represent cattle growth has been parameterized with data from Bos taurus (British) and Bos indicus (Nellore) breeds. The DGM has been successfully used for simulation and decision support in the United States. However, the effect of about 30 yea
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-02
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7. Bootstrap confidence intervals for industrial recurrent event data
Industrial recurrent event data where an event of interest can be observed more than once in a single sample unit are presented in several areas, such as engineering, manufacturing and industrial reliability. Such type of data provide information about the number of events, time to their occurrence and also their costs. Nelson (1995) presents a methodology t
Pesquisa Operacional. Publicado em: 03/04/2012
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8. Confidence intervals for DEA efficiency measurements applied to Embrapa´s research system: a bootstrap approach.
Neste artigo foi estudado o sistema de produção de pesquisa da Embrapa, a maior instituição brasileira de pesquisa agropecuária. A principal ferramenta teórica usada foi a Análise de Envoltória de Dados ? DEA. Exploraram-se a interpretação econômica e as propriedades estatísticas desses modelos, para calcular intervalos de confiança para medidas
SIMPÓSIO DE PESQUISA OPERACIONAL. Publicado em: 2011
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9. MÉTODOS ESTATÍSTICOS APLICADOS AO CÁLCULO DA AMPACIDADE E RISCO TÉRMICO DE LINHAS AÉREAS DE TRANSMISSÃO / STATISTICAL METHODS APPLIED TO AMPACITY AND THERMAL RISK CALCULATION OF OVERHEAD TRANSMISSION LINES
This work presents a new proposition for calculation of statistical ampacity and thermal risks associated to ampacity values by using simulation methods that employ intensive computation. The proposed approach uses Bootstrap and Monte Carlo simulation methods in order to calculate and infer information of statistical ampacity drawn from meteorological variab
Publicado em: 2008
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10. Catch-effort data analysis of the main small-scale fisheries in baÃa de Todos os Santos and baixo sul, state of Bahia, Brazil / AnÃlise quantitativa dos dados de captura e esforÃo de pesca das principais pescarias de pequena-escala praticadas na baÃa de Todos os Santos e baixo sul do estado da Bahia
Catch-effort data from main small-scale fisheries in Baia de Todos os Santos and Baixo Sul, in the State of Bahia, NE- Brazil, were collected by sampling the catches (kg) at random from April- 2005 to September - 2006. The uncertainty of the estimatives of the cpues was assessed by the resampling method. The results indicated that a different number of sampl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2007
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11. AnÃlise discriminante clÃssica e de nÃcleo: avaliaÃÃes e algumas contribuiÃÃes relativas aos mÃtodos Boosting e Bootstrap
Since information technology is essential for many activities of modern life and massive data sets come with it, data mining has become one of the most important research topics in statistical science. Even thought there are many fields related to data mining, the task of classification still remain as one of the most common in statistical literature. This d
Publicado em: 2007
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12. Eficiência das escolas públicas estaduais de Minas Gerais: considerações acerca da qualidade a partir da análise dos dados do SICA e do SIMAVE
This paper develops the semi-parametrical two-stage Data Envelopment Analysis to detect the efficiency frontier of public Brazilian Minas Gerais state schools. The first stage computes the DEA-efficiency, the second one inputs the DEA results to a truncated-regression with background and wealth variables. All methods discussed here are based on recently pape
Publicado em: 2007