Now showing items 1-13 of 13

    • Parametric and nonparametric Bayesian statistical inference in animal science 

      Pretorius, Albertus Lodewikus (University of the Free State, 2000-11)
      Chapter 1 illustrated an extension of the Gibbs sampler to solve problems arising in animal breeding theory. Formulae were derived and presented to implement the Gibbs sampler where-after marginal densities, posterior ...
    • Aspects of Bayesian change-point analysis 

      Schoeman, Anita Carina (University of the Free State, 2000-11)
      English: In chapter one we looked at the nature of structural change and defined structural change as a change in one or more parameters of the model in question. Bayesian procedures can be applied to solve inferential ...
    • A Bayesian analysis of multiple interval-censored failure time events with application to AIDS data 

      Mokgatlhe, Lucky (University of the Free State, 2003-05)
      English: The measure of time to event (failure) for units on longitudinal clinical visits cannot always be ascertained exactly. Instead only time intervals within which the event occurred may be recorded. That being the ...
    • Hierarchical Bayesian modelling for the analysis of the lactation of dairy animals 

      Lombaard (née Viljoen), Carolina Susanna (University of the Free State, 2006-03)
      English: This thesis was written with the aim of modelling the lactation process in dairy cows and goats by applying a hierarchical Bayesian approach. Information on cofactors that could possibly affect lactation is included ...
    • On the use of extreme value theory in energy markets 

      Micali, V. (University of the Free State, 2007-05-09)
      English: The thesis intent is to provide a set of statistical methodologies in the field of Extreme Value Theory (EVT) with a particular application to energy losses, in Gigawatt-hours (GWh) experienced by electrical ...
    • Actuarial risk management of investment guarantees in life insurance 

      Bekker, Kobus Nel (University of the Free State, 2010-11)
      Investment guarantees in life insurance business have generated a lot of research in recent years due to the earlier mispricing of such products. These guarantees generally take the form of exotic options and are therefore ...
    • Bayesian inference for linear and nonlinear functions of Poisson and binomial rates 

      Raubenheimer, Lizanne (University of the Free State, 2012)
      This thesis focuses on objective Bayesian statistics, by evaluating a number of noninformative priors. Choosing the prior distribution is the key to Bayesian inference. The probability matching prior for the product of ...
    • Bayesian tolerance intervals for variance component models 

      Hugo, Johan (University of the Free State, 2012-01)
      English: The improvement of quality has become a very important part of any manufacturing process. Since variation observed in a process is a function of the quality of the manufactured items, estimating variance components ...
    • Modelling electricity demand in South Africa 

      Sigauke, Caston (University of the Free State, 2014-01)
      English: Peak electricity demand is an energy policy concern for all countries throughout the world, causing blackouts and increasing electricity tariffs for consumers. This calls for load curtailment strategies to either ...
    • Bayesian non-linear models for the bactericidal activity of tuberculosis drugs 

      Burger, Divan Aristo (University of the Free State, 2015-05)
      Trials of the early bactericidal activity (EBA) of tuberculosis (TB) treatments assess the decline, during the first few days to weeks of treatment, in colony forming unit (CFU) count of Mycobacterium tuberculosis in the ...
    • Extending the reach of sequential regression multiple imputation 

      Von Maltitz, Michael Johan (University of the Free State, 2015-06)
      English: The purpose of this thesis is twofold. Firstly, it reviews a signi cant portion of literature concerning multiple imputation and, in particular, sequential regression multiple imputation, and summarises this ...
    • On some methods of reliability improvement of engineering systems 

      Mangara, Bernard Tonderayi (University of the Free State, 2015-08)
      The purpose of this thesis was to study some methods of reliability improvement of engineering systems. The reason for selecting the theme “reliability improvement of engineering systems” was first to explore traditional ...
    • Bayesian control charts based on predictive distributions 

      Van Zyl, Ruaan (University of the Free State, 2016-01)
      English: Control charts are statistical process control (SPC) tools that are widely used in the monitoring of processes, specifically taking into account stability and dispersion. Control charts signal when a significant ...