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modeling methods » models methods (Expander búsqueda), modern methods (Expander búsqueda), costing methods (Expander búsqueda)
probit modeling » probit model (Expander búsqueda), probit models (Expander búsqueda), process modeling (Expander búsqueda)
1
artículo
Publicado 2023
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Objective. To determine the impact of having Regular Basic Education (EBR) studies on the condition of being poor in the population of the Huánuco region (Peru), for the period 2010-2020. Methods. The research was applied, adopted an explanatory level and a non-experimental design. Human capital theory and data from the National Household Survey were used as a theoretical basis for the estimation of a probit model. Results. It was found that people with secondary education are less likely to be poor. In particular, it was found that the probability of being monetarily poor of a person with initial, primary and secondary education decreases by 0.11 pp, 2.19 pp and 3.60 pp, respectively. Conclusions. It is concluded that having a higher level of RBS education leads to a greater decrease in the probability of being poor from the monetary approach to poverty.
2
tesis de grado
Publicado 2012
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The present investigation was aimed at obtaining the Median Lethal Dose and lethal time dose with five and seven time in nematodes (larvae of Diatraea sacharalis III Fabricius) using a Probit analysis. Statistical Analysis was performed in this research is the analysis of variance (ANOVA) of a completely randomized design, which allowed us to analyze whether or not statistically significant, which we conclude that if there is a difference among the five doses (0 ml, 2 ml, 4 ml, 8 ml and 16 ml) of Heterorhabditis bacteriophora, finding that the dose which has a higher mortality rate is the dose of 8 ml and 16 ml, and no difference between both doses. It was found that the median lethal dose (DL50) is 0.6674 ml. We found that the mean lethal time (TL50) is 144.63 hours. Among the different methods that can be to find the DL50 and TL50, we can say that the most suitable is the Probit Analys...
3
artículo
Publicado 2023
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Addressing the global challenge of sustainable waste management, this research investigates the influence of social dynamics and digital connectivity on rural residents’ willingness to adopt waste classification practices, essential for sustainable environmental management. Through a comprehensive analysis of 5413 rural participants surveyed in the China Labor-force Dynamic Survey (CLDS), this study employs a novel mixed-methods approach. It integrates quantitative analysis with the Manski social interaction framework and a Recursive Bivariate Probit model to explore the intricate interplay between community interactions, internet access, and environmental behaviors. Our methodology stands out for its unique combination of social theory and econometric modeling to address a pressing environmental issue. Results highlight a significant effect of mobile internet use and social interactio...
4
artículo
Publicado 2020
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Macrophyte Lemna minor (Linnaeus, 1753) was used to evaluate the phytotoxicity of the individual and mixed action of methomyl and rotenone pesticides under laboratory conditions (Temperature 29 ± 2°C; Relative humidity 48.6± 9.4%). The taken measures to establish half eff ective concentration were the frond area (AF) and production of new fronds (NF). In this study, BMDS® and Probit statistical data analyses were used to compare the results about eff ective concentration. Results suggest Benchmark dose method of BMDS® program was more eff ective than Probit program when EC50 (mean Eff ective Concentration) were determined. Additionally, total chlorophyll concentration (TCC) and humidity weight (HW) parameters were calculated to determine the growth inhibition (Ir). Likewise, NOAEL (no observed adverse eff ect level) and LOAEL (low observer adverse eff ect level) were compared with B...
5
artículo
Publicado 2014
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This article aims to develop a UNMSM student population employability index by identifying the main conditioning factors affecting their probability of getting employed.Thus, the results show that the mean potential employability index of the UNMSM students stands at 55.51%.The economical regression was made through the probit model method, and the traits assessed were their marks arithmetic mean, responsibility, ease of use of informatics software, job finding skills, work experience, the own perception of their resume to satisfy adequately the general requirements of the market and, overall empathy with their colleagues. We found that there exists a clear correlation with being over the average at this traits and a higher chance of getting employed.
6
artículo
Publicado 2020
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Macrophyte Lemna minor (Linnaeus, 1753) was used to evaluate the phytotoxicity of the individual and mixed action of methomyl and rotenone pesticides under laboratory conditions (Temperature 29 ± 2°C; Relative humidity 48.6± 9.4%). The taken measures to establish half eff ective concentration were the frond area (AF) and production of new fronds (NF). In this study, BMDS® and Probit statistical data analyses were used to compare the results about eff ective concentration. Results suggest Benchmark dose method of BMDS® program was more eff ective than Probit program when EC50 (mean Eff ective Concentration) were determined. Additionally, total chlorophyll concentration (TCC) and humidity weight (HW) parameters were calculated to determine the growth inhibition (Ir). Likewise, NOAEL (no observed adverse eff ect level) and LOAEL (low observer adverse eff ect level) were compared with B...
7
artículo
Publicado 2014
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El objetivo central de este artículo consiste en construir un índice de empleabilidad de los estudiantes de la UNMSM y, a su vez, identificar los factores que condicionan la probabilidad de que estos encuentren empleo.El índice de empleabilidad potencial promedio de los estudiantes sanmarquinos es de 55.51%, que representa una empleabilidad media.El resultado de la regresión econométrica efectuada con el método del modelo probit indica que la probabilidad de que un alumno de la UNMSM consiga empleo o una práctica preprofesional es mayor en la medida en que sea mayor su promedio de notas ponderadas, sea responsable, maneje más programas informáticos, conozca los métodos de búsqueda de trabajo, posea experiencia laboral, tenga la percepción de que su perfil profesional es adecuado para lo que demanda el mercado y mantenga empatía con sus compañeros de la universidad.
8
objeto de conferencia
Publicado 2022
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El estudio se realizó teniendo en cuenta la contaminación generada por la inadecuada gestión de residuos sólidos municipales; por ello, el objetivo fue identificar los métodos y modelos usados en una Valoración Económica para la mejora de la Gestión de Residuos Sólidos Municipales, a partir del análisis de artículos entre los años 2010 a 2020, utilizando la metodología PRISMA. Como resultados se tuvo que el método utilizado para la Valoración Económica fue la Valoración Contingente que se basa en la aplicación de una encuesta para determinar la Disposición a Pagar (DAP) del ciudadano, que a su vez está influenciada directamente por variables como el Nivel de Educación, Edad, Ingresos, entre otros. Para el análisis de datos usó modelos como el Logit Binomial (46.2%), Probit Binomial (13.8%), Regresión Logística (30.8%) y el modelo Tobit (9.2%). Se concluye que, el...
9
artículo
Publicado 2017
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The aim of the study is to determine the income limit that separates rural families with and without food security, and to identify the factors that influence in the state of food insecurity of rural families in the Andes of Peru during the year 2015. Using the database of the National Survey of Homes produced by the National Institute of Statistics and Informatics of Peru, the income limit was obtained by estimating the modified Engel curve with two concavities, using the Ordinary Least Squares method; and through a Probit model, the factors influencing the state of food insecurity of rural families were identified. It is concluded that the income limit between families with and without food security is S/ 593.46 per month, which allowed a food expenditure of S/ 356.46 per month. Likewise, the factors that would reduce the state of food insecurity are constituted by: if the head of hous...
10
artículo
Publicado 2017
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The aim of the study is to determine the income limit that separates rural families with and without food security, and to identify the factors that influence in the state of food insecurity of rural families in the Andes of Peru during the year 2015. Using the database of the National Survey of Homes produced by the National Institute of Statistics and Informatics of Peru, the income limit was obtained by estimating the modified Engel curve with two concavities, using the Ordinary Least Squares method; and through a Probit model, the factors influencing the state of food insecurity of rural families were identified. It is concluded that the income limit between families with and without food security is S/ 593.46 per month, which allowed a food expenditure of S/ 356.46 per month. Likewise, the factors that would reduce the state of food insecurity are constituted by: if the head of hous...
11
artículo
Publicado 2017
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The aim of the study is to determine the income limit that separates rural families with and without food security, and to identify the factors that influence in the state of food insecurity of rural families in the Andes of Peru during the year 2015. Using the database of the National Survey of Homes produced by the National Institute of Statistics and Informatics of Peru, the income limit was obtained by estimating the modified Engel curve with two concavities, using the Ordinary Least Squares method; and through a Probit model, the factors influencing the state of food insecurity of rural families were identified. It is concluded that the income limit between families with and without food security is S/ 593.46 per month, which allowed a food expenditure of S/ 356.46 per month. Likewise, the factors that would reduce the state of food insecurity are constituted by: if the head of hous...
12
artículo
Publicado 2017
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The aim of the study is to determine the income limit that separates rural families with and without food security, and to identify the factors that influence in the state of food insecurity of rural families in the Andes of Peru during the year 2015. Using the database of the National Survey of Homes produced by the National Institute of Statistics and Informatics of Peru, the income limit was obtained by estimating the modified Engel curve with two concavities, using the Ordinary Least Squares method; and through a Probit model, the factors influencing the state of food insecurity of rural families were identified. It is concluded that the income limit between families with and without food security is S/ 593.46 per month, which allowed a food expenditure of S/ 356.46 per month. Likewise, the factors that would reduce the state of food insecurity are constituted by: if the head of hous...
13
tesis de grado
Publicado 2018
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Universidad Nacional Agraria La Molina. Facultad de Economía y Planificación. Departamento Académico de Economía y Planificación
14
tesis de maestría
El estudio se origina con el propósito de contribuir a la comunidad científica mediante la descripción y aplicación de modelos bayesianos capaces de mitigar el efecto distorsionador de las variables cuantitativas sobre una variable respuesta binaria, especialmente en presencia de valores extremos y debido a una mala especificación de la función de enlace en el predictor lineal. El objetivo de esta investigación fue estudiar dichas propiedades de los modelos de regresión bayesianos robustas, utilizando simulaciones y casos con datos reales para evaluar su rendimiento comparado con un modelo tradicional. Los modelos bayesianos robustos analizados incluyen los modelos Robit con enlace t- Student y parámetro de forma fijo, así como una variante en la que el parámetro de forma se estima a partir de los datos (Robit v aleatorio). Además, se examinó un modelo Robit con función de ...
15
tesis doctoral
Publicado 2004
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La presente investigación ha tenido por objetivos evaluar la actividad citotóxica, antimitótica, antimutagénica y antiviral del extracto metanólico al 10% p/v de hojas de Calophylum brasiliense Cambess de la zona de Satipo. MATERIAL Y METODOS: Se utilizaron métodos estandarizados de acuerdo all Manual de Técnicas del CYTED y según Skehan, Gustafson y Simmons. RESULTADOS: Se observó un buen efecto citotóxico en el bioensayo en Artemia salina con una CL50 (Concentración Letal Media) = 70.5 ppm, con un limite superior e inferior al 95% de 136.50ppm y de 36.4ppm de acuerdo al método de Probits, observándose una inhibición sobre líneas celulares tumorales U251, PC-3, HCT15, MCF7 y K562 de 109.42%, 95.67%, 96.16%, 102.68% y 95.69% respectivamente con una p menor a 0,01. En la evaluaciòn antimitòtica en cebolla, al cabo de 6 horas de tratamiento el índice mitótico de las cél...
16
artículo
Publicado 2022
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The present investigation was done to evaluate lethal dose fifty (DL50) and effective dose average (DE50) of the antiinflammatory effect of a methanolic extract of the leaves of Pelargonium robertianum L."Geranio". To evaluate the DL50, 36 mice were used, divided in groups of 6 animals that received different doses of the methanolic extract by oral route using intragastric cannulae. Animals were observed during the first 24, 48 and 72 hours. The value of the DL50 was of 8,717.02 mg/kg by the Lichfield and Wilcoxon method. DE50 following Winter's Model (1970) and Sughisita et.al. was also performed. We observed that the methanolic extract presented an inhibitory effect of inflammation when compared to that of Diclofenac (62%) obtaining 26, 38 and 57% for the different doses assayed. The Average Effective Dose obtained was of 681,9577 by the method of Probits with ANOVA (p=0.0001,F=5240, R...
