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Enviaments recents

  • Graphical comparison of normality tests for unimodal distribution data 

    Sánchez Espigares, Josep Anton; Grima Cintas, Pedro; Marco Almagro, Lluís (2019-01-02)
    Article
    Accés restringit per política de l'editorial
    A methodology is proposed to compare the power of normality tests with a wide variety of alternative unimodal distributions. It is based on the representation of a distribution mosaic in which kurtosis varies vertically ...

  • Outlier detection for multivariate categorical data 

    Puig Oriol, Xavier; Ginebra Molins, Josep (2018)
    Article
    Accés restringit per política de l'editorial
    The detection of outlying rows in a contingency table is tackled from a Bayesian perspective, by adapting the framework adopted by Box and Tiao for normal models to multinomial models with random effects. The solution ...

  • Functional regression on remote sensing data in oceanography 

    Acar Denizli, Nihan; Delicado Useros, Pedro Francisco; Basarir, Gülay; Caballero de Frutos, Isabel (2018-06-01)
    Article
    Accés obert
    The aim of this study is to propose the use of a functional data analysis approach as an alternative to the classical statistical methods most commonly used in oceanography and water quality management. In particular we ...

  • Cokriging and multivariate kriging methods based on data of a functional random field 

    Giraldo, Ramon; Delicado Useros, Pedro Francisco; Mateu Mahiques, Jorge (2017-12-23)
    Article
    Accés obert
    Kriging and cokriging and their several related versions are techniques widely known and used in spatial data analysis. However, when the spatial data are functions a bridge between functional data analysis and geostatistics ...

  • A bayesian test for Hardy-Weinberg equilibrium of bi-allelic X-chromosomal markers 

    Puig Oriol, Xavier; Ginebra Molins, Josep; Graffelman, Jan (2017-07)
    Article
    Accés obert
    The X chromosome is a relatively large chromosome, harboring a lot of genetic information. Much of the statistical analysis of X-chromosomal information is complicated by the fact that males only have one copy. Recently, ...

  • Choosing the most relevant level sets for depicting a sample of densities 

    Delicado Useros, Pedro Francisco; Vieu, Philippe (2017-09-01)
    Article
    Accés obert
    When exploring a sample composed with a set of bivariate density functions, the question of the visualisation of the data has to front with the choice of the relevant level set(s). The approach proposed in this paper ...

  • CHROMA: a maturity model for the information-driven decision-making process 

    Tort-Martorell Llabrés, Xavier; Parra, Xileidys (2017)
    Article
    Accés restringit per política de l'editorial
    A novel maturity model for the information-driven decision-making process (DMP) in organisations is presented. The 'circumplex hierarchical representation of organisation maturity assessment' (CHROMA) model was developed ...

  • Puntos de servicio en aseos públicos para minimizar y equilibrar los tiempos de espera de hombres y mujeres 

    Grima Cintas, Pedro; Marco Almagro, Lluís; Tort-Martorell Llabrés, Xavier (Consejo Superior de Investigaciones Científicas (CSIC), 2017-07-01)
    Article
    Accés obert
    The article raises the issue of the queues that usually appear in the ladies toilets in contrast to the fluidity with which gentlemen can access theirs, and points that this situation is only due to bad dimensioning of the ...

  • Measuring non-linear dependence for two random variables distributed along a curve 

    Delicado Useros, Pedro Francisco; Marcelo, Smrekar (2009-09)
    Article
    Accés obert
    We propose new dependence measures for two real random variables not necessarily linearly related. Covariance and linear correlation are expressed in terms of principal components and are generalized for variables distributed ...

  • Puntos de servicio en aseos públicos para minimizar y equilibrar los tiempos de espera de homb res y mujeres 

    Grima Cintas, Pedro; Marco Almagro, Lluís; Tort-Martorell Llabrés, Xavier (Consejo Superior de Investigaciones Científicas (CSIC), 2017-04)
    Article
    Accés obert
    Se plantea el problema de las colas que se presentan habitualmente en los aseos de señoras en contraste con la fluidez con que se accede a los de caballeros, considerando que esta situación tiene solución ya que es sólo ...

  • Blocking versus robustness in industrial contexts 

    Grima Cintas, Pedro; Marco Almagro, Lluís; Tort-Martorell Llabrés, Xavier (2017-01-01)
    Article
    Accés obert
    The paper discusses the similarities and differences between blocking factors (blocked designs) and noise factors (robust designs) in industrial two-level factorial experiments. The discussion covers from the objectives ...

  • Estimating missing values from negligible interactions in factorial designs 

    Xampeny Solani, Rafael; Grima Cintas, Pedro; Tort-Martorell Llabrés, Xavier (2017-01-01)
    Article
    Accés obert
    When a factorial design has some missing value but there are contrasts (at least as many as there are missing values) corresponding to interactions that can be considered negligible, equating the expressions of those ...

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