Theses and Dissertations (Statistics)

Theses and Dissertations (Statistics)

 

Recent Submissions

  • Omachar, Brenda V. (University of Pretoria, 2014)
    This dissertation proposes the development of a new quantile-based generalized logistic distribution GLDQB, by using the quantile function of the generalized logistic distribution (GLO) as the basic building block. This ...
  • Cronje, Tanita (University of Pretoria, 2014-05)
    In this decision-driven era, it has become vital for modelers to efficiently model consumer choices and preferences (from a marketing perspective for instance). Conjoint analysis is a known method which has been used to ...
  • Ferreira, Johannes Theodorus (University of Pretoria, 2014-04)
    The univariate and bivariate central chi-square- and F distributions have received a decent amount of attention in the literature during the past few decades; the noncentral counterparts of these distributions have been ...
  • Du Toit, Benjamin David (University of Pretoria, 2014)
    Data Compression Due to limitations in data storage and bandwidth, data of all types has often required compression. This need has spawned many different methods of compressing data. In certain situations the fidelity of ...
  • Diko, Mandla Doctor (University of Pretoria, 2014)
    In Chapter 1, we give a brief introduction to statistical process control (SPC) and provide definitions as well as background information regarding the research conducted in this mini-dissertation. This will aid in ...
  • Vithal, Nishay (University of Pretoria, 2013)
    This mini-dissertation seeks to provide the reader with an understanding of one of the most popular boosting methods in use today called Adaboost and its first extension Adaboost.M1. Boosting, as the name suggests, is an ...
  • van Wyk de Vries, Jan (University of Pretoria, 2013)
    The Cox-Proportional Hazards model is introduced as a potential tool to understand customer behavior relating to churn or disconnections in the telecommunications space. An overview of Survival Analysis is provided along ...
  • Shongwe, Sandile Charles (University of Pretoria, 2014)
    No abstract
  • Le Roux, Colette (University of Pretoria, 2020)
    Copulas allow a joint probability distribution to be decomposed such that the marginals inform us about how the data were generated, separately from the copula which fully captures the dependency structure between the ...
  • Kunene, Thembinkosi (University of Pretoria, 2020)
    In this mini-dissertation we discuss the spatial relationship between point processes and a linear network. As a starting point, we discuss basic spatial point processes and tests for first-order homogeneity. Following that, ...
  • Mazarura, Jocelyn Rangarirai (University of Pretoria, 2020)
    Most topic models are constructed under the assumption that documents follow a multinomial distribution. The Poisson distribution is an alternative distribution to describe the probability of count data. For topic modelling, ...
  • Nigrini, Sharday (University of Pretoria, 2021)
    Due to tuberculosis (TB) being one of the top ten diseases in Africa with the highest mortality rate, a crucial objective is to find the appropriate medication to cure patients and prevent people from contracting the ...
  • Van Zyl, Christine Elizabeth (University of Pretoria, 2021)
    The interest in the study and modeling of the strength within material science has continuously been of interest within engineering and the built environment, with the Weibull distribution frequently being the model of ...
  • Laidlaw, Michaela (University of Pretoria, 2021)
    Buidling off a foundation of knowledge from studies into modelling wind speed, models are fitted to multimodal datasets of geological nature. Mixtures of distributions are derived with parameter updates done via ...
  • Mac'Oduol, Brenda Vuguza (University of Pretoria, 2020)
    This thesis develops a skewing methodology for the formulation of two-piece families of distri- butions that can be defined through their cumulative distribution functions (CDFs), probability density functions (PDFs) or ...
  • Wragg, Trystan (University of Pretoria, 2020)
    The Rayleigh distribution is a special case of different families of distributions, one of these being the Weibull distribution. This mini-dissertation considers the development of a new distributional family, the ...
  • Kirsten, René (University of Pretoria, 2020)
    Two spatial data sets are considered to be similar if they originate from the same stochastic process in terms of their spatial structure. Many tests have been developed over recent years to test the similarity of certain ...
  • Nel, Helene Mari (University of Pretoria, 2021)
    Longitudinal data refer to multiple observations collected on the same subject (or unit) over time. Zero-inflated data (containing many zeros) frequently occur, resulting in overdispersion in count data. Regression models ...
  • Stander, Jean-Pierre (University of Pretoria, 2020)
    Deep learning is a very popular field of research which can input a variety of data types [1, 16, 30]. It is a subfield of machine learning consisting of mostly neural networks. A challenge which is very commonly met in ...
  • Roux, Hannaline (University of Pretoria, 2019)
    If a known distribution on a real line is given, it can be wrapped on the circumference of a unit circle. This research entails the study of a univariate skew-normal distribution where the skew-normal distribution is ...

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