Mathematical Statistics
Mostrando 1-12 de 58 artigos, teses e dissertações.
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1. Abordagem das Dificuldades de Ensino e Aprendizagem do Domínio da Estatística na Graduação em Psicologia: um olhar através do contrato didático
Resumo O ensino de conteúdos conceituais, competências e habilidades relacionados à análise quantitativa de dados nos cursos de graduação em Psicologia tem se mostrado problemático. Enquanto domínio da Matemática, a Estatística de fato se distancia dos saberes usualmente trabalhados nas demais disciplinas. O estudo em questão buscou investigar asp
Bolema. Publicado em: 02/12/2019
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2. INITIAL GROWTH PERFORMANCE OF VALUABLE TIMBER SPECIES IN SOUTHERN BRAZIL: Araucaria Angustifolia, Balfourodendron Riedelianum, AND Parapiptadenia Rígida
RESUMO Foi avaliado o crescimento inicial de três espécies madeireiras nativas do Brasil - Araucaria angustifolia, Balfourodendron riedelianum e Parapiptadenia rigida - em Dois Vizinhos - PR, Brasil, usando quatro modelos matemáticos não lineares (Gompertz, Logistic, Logistic 4P e Chapman-Richards). Ao longo dos quatro anos iniciais após plantio, inform
Rev. Árvore. Publicado em: 28/11/2019
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3. Forecasting the Electricity Consumption in a Higher Education Institution
Abstract The objective of this paper is to present a mathematical representation by Regression Analysis that enables the projection of electricity consumption according to the built area and population in Higher Education Institutions (HEI) and to define an Indicator that contemplates the most significant variable in consumption. of electric power. The Null
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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4. Sobre modelagem matemática e formalismos estatísticos de sistemas complexos
Resumo Os Sistemas Dinâmicos Complexos são sistemas com propriedades emergentes inesperadas resultantes de processos sinérgicos de seus componentes. Estes sistemas aparecem na física e na química e desempenham um papel fundamental em sistemas biológicos. Tais sistemas requerem um tratamento teórico em termos de “Modelagem Matemática”, com os form
Rev. Bras. Ensino Fís.. Publicado em: 09/09/2019
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5. Can leaf area in rice be defined by a mathematical model?
ABSTRACT The goal of this study was to define an empirical model to calculate the leaf area in rice from linear leaf measure in genotypes used by farmers in Brazil. Through the leaf dimensions it is possible to identify the final crop yield from the LAI. Therefore, the leaves shape is closely related to the production of photoassimilates that will be convert
Rev. Ceres. Publicado em: 12/08/2019
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6. The Influence of Statistical Anxiety on Statistic Reasoning of Pre-service Mathematics Teachers
Abstract The large number of statistical data present in everyday life makes statistical reasoning an absolute ability possessed by students. Meanwhile, the statistical reasoning is influenced by various cognitive and non-cognitive factors. This study emphasizes the influence of non-cognitive factors, which are the statistical anxiety. The purpose of this st
Bolema. Publicado em: 01/08/2019
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7. Evaluation of mathematical equations for estimating leaf area in rapeseed
RESUMO Objetivou-se avaliar a estimativa da área foliar de canola (Brassica napus L.) com potencial de aplicação para distintos genótipos, condições ambientais e de manejo da cultura. Em experimentos conduzidos em 2013; 2014; 2016 e 2017, utilizou-se três genótipos de canola, cinco doses de nitrogênio e três datas de semeadura. Foram coletadas, ale
Rev. Ciênc. Agron.. Publicado em: 04/07/2019
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8. The Log-Odd Normal Generalized Family of Distributions with Application
Abstract: The normal distribution has a central place in distribution theory and statistics. We propose the log-odd normal generalized (LONG) family of distributions based on log-odds and obtain some of its mathematical properties including a useful linear representation for the new family. We investigate, as a special model, the log-odd normal power-Cauchy
An. Acad. Bras. Ciênc.. Publicado em: 01/07/2019
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9. Guía de Valorización de la Idoneidad Didáctica de Procesos de Instrucción en Didáctica de la Estadística
Abstract In order to recognize the important role of teachers in the discipline's teaching and learning processes, in this article, we confront the problem of valuating the teaching planning in statistics didactics. For this, we describe the construction process of a guide that values its suitability according to a collection of indicators inferred through t
Bolema. Publicado em: 2019-04
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10. Modeling of stem form and volume through machine learning
Abstract Taper functions and volume equations are essential for estimation of the individual volume, which have consolidated theory. On the other hand, mathematical innovation is dynamic, and may improve the forestry modeling. The objective was analyzing the accuracy of machine learning (ML) techniques in relation to a volumetric model and a taper function f
An. Acad. Bras. Ciênc.. Publicado em: 18/10/2018
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11. Estudio de las Actitudes hacia la Estadística en Estudiantes de Psicología
Abstract Statistics has been incorporated in most university courses and among them in the degree of Psychology, where the teaching of statistical concepts presents specific learning problems, because students enrolled have a very heterogeneous mathematical basis. In this work, we focus on the study of those students' attitudes for their influence on the lea
Bolema. Publicado em: 2017-04
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12. Numerical Simulation on the Radar Cross Section of Variable-Sweep Wing Aircraft
ABSTRACT: The influence of variable-sweep wing on the aircraft's radar cross section (RCS) characteristics has been studied to reduce the aircraft's RCS as well as its detection probability by the hostile radar. With the help of CATIA, a 3-D digital model of the variable-sweep wing aircraft is built to generate a series of digital grids. Using MATLAB, a nume
J. Aerosp. Technol. Manag.. Publicado em: 2015-06