Resultados de búsqueda - "variance"

Hypothesis test for changes in variance using a statistic based in P-values in a time series of normal independent observations. por Armendáriz Hernández, Samuel Uriel

“…The present work proposes a Hypothesis Test to detect a shift in the variance of a series of independent normal observations using a statistic based on the p-values of the F distribution. …”
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Hypothesis test for changes in variance using a statistic based in P-values in a time series of normal independent observations. por Armendáriz Hernández, Samuel Uriel

“…The present work proposes a Hypothesis Test to detect a shift in the variance of a series of independent normal observations using a statistic based on the p-values of the F distribution. …”
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Evolución y eficiencia relativa de los mercados bursátiles de MENA: evidencia de pruebas de índice de varianza conjunta móvil: Evolving and relative efficiency of MENA stock markets: evidence from rolling joint variance ratio tests por Ahmed, Amira Akl

Materias: “…Variance Ratio Tests…”
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Diseño para Seis Sigma: Enfoque para la fiabilidad y fabricación de bajo costo por Cruz-Álvarez, Jesús Gerardo

Materias: “…Analysis of Variance (ANOVA)…”
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Analysis of multiple change-points in normally distributed series por Garza Venegas, Jorge Arturo

“…A change is considered as one of the three different cases: (1) change only in mean parameter, (2) change only in variance parameter or (3) change in both parameters. …”
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Analysis of multiple change-points in normally distributed series por Garza Venegas, Jorge Arturo

“…A change is considered as one of the three different cases: (1) change only in mean parameter, (2) change only in variance parameter or (3) change in both parameters. …”
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Modelling the Density of Inflation Using Autoregressive Conditional Heteroscedasticity, Skewness, and Kurtosis Models por Akl Ahmed, Doaa

“…The results revealed the significant persistence in conditional variance, skewness and kurtosis which indicate high asymmetry of inflation. …”
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Análisis del rendimiento del torneado utilizando coeficiente de vida útil en relación al volumen de metal cortado por Morales Tamayo, Yoandrys, Zamora Hernández, Yusimit, Zambrano Robledo, Patricia del Carmen, Beltrán Reyna, Roberto Félix

“…Keywords: High speed turning, stainless steel AISI 316L, flank wear, variance and regressions analysis, volume of the cut metal.…”
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Income divergence between mexican states in the 1990s: the role of skill premium por Aguayo Téllez, Ernesto

“…During the period 1940–1985 the variance of average incomes across Mexican states fell by 60 percent. …”
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Body image perception in Mexican university athletes VS non-athletles por Peinado Pérez, Jesús Enrique, Rodríguez Villalobos, Judith Margarita, Aguirre Chávez, Juan Francisco, Tristán Rodríguez, José Leandro, Castillo Fernández, Isabel María

“…The results of the one-way multivariate analysis of variance, followed by the one-way univariate analyses of variance, show that university students who don’t participate in a regular sport are the ones who show thicker models for their present, ideal and social figure, in addition to demonstrating higher body size dissatisfaction. …”
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A gender study of self-efficacy perceived in Socio-cultural environment in Mexican university students in the health area por Chávez Guerrero, Alejandro, Peinado Pérez, Jesús Enrique, Aguirre Chávez, Juan Francisco, Ceballos Gurrola, Oswaldo, Rivero Carrasco, Guadalupe Javier

“…The results of the one-way multivariate analysis of variance, followed by the one-way univariate analyses of variance, showed that women reported significant higher punctuations than men regarding the perceived self-efficacy in promotion of the culture and cultural identity (p< .001). …”
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Young Mexican physical self – concept gender comparisons por Ceballos Gurrola, Oswaldo, Zueck Enriquez, María del Carmen, Blanco, José René, Rodríguez Villalobos, Judith Margarita, Alvarez, Gustavo

“…Results of the one-way multivariate analysis of variance, followed by the one-way univariate analysis of variance, showed that in comparison among women, men obtained higher scores on the health, coordination, activity, sports competence, strength, flexibility, endurance, global physical self-concept and global self-esteem subscales. …”
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Variables related to sexual prejudice among Mexican health science students por Moral de la Rubia, José, Valle de la O, Adrián, Garcia Cadena, Cirilo Humberto

“…There exist other variables that were not taken into account in this study, as is deduced by the high percentage of unexplained variance…”
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Satisfaction of an employee in a sports entity: design and validation of a measurement scale por Reyes Robles, Marina, Medina Rodríguez, Rosa Elena, Ramírez Siqueiros, María Grethel, López Walle, Jeanette M., Ceballos Gurrola, Oswaldo

“…Satisfactory values were obtained, resulting in Kaiser-Meyer-Olkin values of .91, and the Bartlett test was statistically significant with a value (χ² = 3296.01, gl = 378; p <. 001), six factors were extracted with eigen values greater than 1 and that together explain 69.08% of the total variance. the indices of the model in the confirmatory factor analysis were satisfactory: χ2 / df = 1.29, NNFI = .99, CFI = .99, and RMSEA = .03., The results of internal consistency using Cronbach's alpha index with values in this case greater than .70, composite reliability (CR) with values between .88 and .94, and the average variance index extracted (AVE), meanwhile, alsoshowed adequate values, in a range between .60 and .83. …”
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Preferencias y demandas inmediatas que compiten con la actividad física en jóvenes: Desarrollo de instrumentos y propiedades psicométricas por Cruz Castruita, Rosa María, Salazar González, Bertha Cecilia, Ceballos Gurrola, Oswaldo, Cruz Castruita, Evelyn Lizeth

“…Factor analysis, using principal components and varimax rotation revealed eight factors on that the preferences instruments, explaining 48.27% of total variance. Five factors were extracted from the competing demands instrument, explaining 52.98% of the total variance. …”
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Insatisfacción corporal en universitarios mexicanos deportistas y no deportistas por Blanco Ornelas, Luis Humberto, Tristán Rodríguez, José Leandro, Mayorga Vega, Daniel, Ornelas Contreras, Martha

“…Results of the one-way multivariate analysis of variance, followed by the oneway univariate analyses of variance, showed that university students who do not regularly participate in sports display thicker models for their present, ideal and social figure. …”
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A physical-cognitive intervention to enhance gait speed in older mexican adults por Salazar González, Bertha Cecilia, Cruz Quevedo, Juana Edith, Gallegos Cabriales, Esther Carlota, Villarreal Reyna, María de los Ángeles, Ceballos Gurrola, Oswaldo, Hernández Cortés, Perla Lizeth, Garza Elizondo, María Eugenia, Gómez Meza, Marco Vinicio, Enríquez Reyna, María Cristina

“…Two (groups: exercise group vs. control group) by three (time: baseline, week 6, and week 12) repeated-measures multivariate analysis of variance (MANOVA) was applied. Results: Repeated-measures multivariate analysis of variance revealed a significant group effect (Wilks lambda F4,279¼6.78, p , .001); univariate analysis showed significant differences for gait speed (m/s), stride length, cadence, step width, and double support time. …”
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Tamaño óptimo de la muestra (Optimum sample size) por Badii Zabeh, Mohammad Hosein, Castillo, J., Guillén, A.

“…Assuming the normal distribution, the procedures for estimation of sample size for the mean; with and without knowledge of the population variance, and population proportion are noted. Sample size for more than one population feature is also given. …”
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Tamaño óptimo de la muestra por Badii, M. H., Castillo, J., Guillen, A.

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Cuestionario de bruxismo autoinformado. Estudio piloto en el noreste de México por Cruz Fierro, Norma, González Ramírez, Mónica Teresa, Vanegas Farfano, Minerva

“…The factor analysis showed a bifactorial: the latent variables explained one factor of 47.8 % (eigenvalue = 5.26) variance and another of 11.5 % (eigenvalue = 1.27), thus its cumulative variance of this model was 59.36 %. …”
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