Now showing items 1-11 of 11

    • Comparison of Selected Multiple Imputation Methods for Continuous Variables – Preliminary Simulation Study Results 

      Misztal, Małgorzata Aleksandra (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      The problem of incomplete data and its implications for drawing valid conclusions from statistical analyses is not related to any particular scientific domain, it arises in economics, sociology, education, behavioural ...
    • Global aging - the nature of longevity risk 

      Trzpiot, Grażyna (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      In this paper we investigate the latest developments on longevity risk modelling. We first introduce longevity risk to allow for a better understanding of the related challenges in term of risk management from both a ...
    • Hidden Markov Models as a Tool for the Assessment of Dependence of Phenomena of Economic Nature 

      Bernardelli, Michał (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      The assessment of dependence between time series is a common dilemma, which is often solved by the use of the Pearson’s correlation coefficient. Unfortunately, sometimes, the results may be highly misleading. In this paper, ...
    • Hidden Markov Models as a Tool for the Assessment of Dependence of Phenomena of Economic Nature 

      Bernardelli, Michał (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      The assessment of dependence between time series is a common dilemma, which is often solved by the use of the Pearson’s correlation coefficient. Unfortunately, sometimes, the results may be highly misleading. In this paper, ...
    • Highly D‑efficient Weighing Design and Its Construction 

      Ceranka, Bronisław; Graczyk, Małgorzata (Wydawnictwo Uniwersytetu Łódzkiego, 2017)
      In this paper, some aspects of design optimality on the basis of spring balance weighing designs are considered. The properties of D‑optimal and D‑efficiency designs are studied. The necessary and sufficient conditions ...
    • Notes on D‑optimal Spring Balance Weighing Designs 

      Ceranka, Bronisław; Graczyk, Małgorzata (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      Spring balance weighing design is a model of an experiment in which the result can be presented as a linear combination of unknown measurements of objects with factors of this combination equalling zero or one. In this ...
    • Notes on D‑optimal Spring Balance Weighing Designs 

      Ceranka, Bronisław; Graczyk, Małgorzata (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      Spring balance weighing design is a model of an experiment in which the result can be presented as a linear combination of unknown measurements of objects with factors of this combination equalling zero or one. In this ...
    • Order statistics in control charts construction 

      Pekasiewicz, Dorota Anna (Wydawnictwo Uniwersytetu Łódzkiego, 2016)
      Order statistics are applied in construction of control charts that are used in statistical process control. Control charts monitor the average process level, volatility or extreme values: maximum and minimum. In the paper ...
    • Scaled Consistent Estimation of Regression Parameters in Frailty Models 

      Bednarski, Tadeusz; Skolimowska-Kulig, Magdalena (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      A computationally attractive method of estimation of parameters for a class of frailty regression models is discussed. The method uses maximum likelihood estimation for the classical exponential regression model. Scaled ...
    • Scaled Consistent Estimation of Regression Parameters in Frailty Models 

      Bednarski, Tadeusz; Skolimowska-Kulig, Magdalena (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      A computationally attractive method of estimation of parameters for a class of frailty regression models is discussed. The method uses maximum likelihood estimation for the classical exponential regression model. Scaled ...
    • Statistics and ethics 

      Wyżnikiewicz, Bohdan (Wydawnictwo Uniwersytetu Łódzkiego, 2018)
      The article concerns ethical rules compiled by both public statistics and users of public statistics. Ethical rules in statistics are partly codified in the European Statistics Code of Practice published by Eurostat, the ...