Browsing Theses and Dissertations (Statistics) by Issue Date

Browsing Theses and Dissertations (Statistics) by Issue Date

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  • The bootstrap approach to autoregressive time series analysis 
    De Koster, Felicia Henriette (University of Pretoria, 2006-11-20)
    Please read the abstract in the section 00front of this document Accompanied by 1 disc available at main counter with shelf number EM 519.5 DE KOSTER. Master copy at back of book
  • Statistical analysis of grouped data 
    Crafford, Gretel (University of Pretoria, 2007)
    The maximum likelihood (ML) estimation procedure of Matthews and Crowther (1995: A maximum likelihood estimation procedure when modelling in terms of constraints. South African Statistical Journal, 29, 29-51) is utilized ...
  • Neural networks for time series analysis 
    Du Plessis, K (University of Pretoria, 2007-02-23)
    The analysis of a time series is a problem well known to statisticians. Neural networks form the basis of an entirely non-linear approach to the analysis of time series. It has been widely used in pattern recognition, ...
  • Optimization and estimation study of manpower planning models 
    Setlhare, Keamogetse (University of Pretoria, 2007-06-18)
    An attempt is made in this thesis to study the optimization and estimation of stochastic models of manpower systems incorporating one or more of the following aspects: (i) recruitment, (ii) promotion, (iii) training and ...
  • Bilevel factor analysis models 
    Pietersen, Jacobus Johannes (University of Pretoria, 2007-12-20)
    The theory of ordinary factor analysis and its application by means of software packages do not make provision for data sampled from populations with hierarchical structures. Since data are often obtained from such populations ...
  • The variable selection problem and the application of the roc curve for binary outcome variables 
    Matshego, James Moeng (University of Pretoria, 2008-08-11)
    Variable selection refers to the problem of selecting input variables that are most predictive of a given outcome. Variable selection problems are found in all machine learning tasks, supervised or unsupervised, classification, ...
  • Theory and applications of modern statistical quality control 
    Human, Schalk William (University of Pretoria, 2009-08-12)
    Please read the abstract in the section front of this document
  • Stochastic analysis of AIDS epidemiology 
    Labeodan, Moremi Morire OreOluwapo (University of Pretoria, 2009-10-29)
    In this thesis, some issues about the human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS) have been addressed by concentrating on the stochastic modelling of the dynamics of the viruses. The ...
  • Markov processes in disease modelling : estimation and implementation 
    Marais, Christiaan Antonie (University of Pretoria, 2010)
    There exists a need to estimate the potential financial, epidemiological and societal impact that diseases, and the treatment thereof, can have on society. Markov processes are often used to model diseases to estimate these ...
  • An investigation into using neural networks for statistical classification and regression 
    Uys, Eben (University of Pretoria, 2010-09-22)
    Neural networks are seldom used as a modelling tool by statisticians. This is often due to the lack of knowledge in the eld of neural networks as neural networks are frequently perceived as mysterious methods that evolved ...
  • Bayesian estimation of Shannon entropy for bivariate beta priors 
    Bodvin, Joanna Sylvia Liesbeth (University of Pretoria, 2010-09-22)
    Having just survived what is arguably the worst financial crisis in time, it is expected that the focus on regulatory capital held by financial institutions such as banks will increase significantly over the next few years. ...
  • Interpolation in stationary spatial and spatial-temporal datasets 
    Smit, Ansie (University of Pretoria, 2010-10-27)
    In the early 1950s the study on how to determine true ore-grade distributions in the mining sector, sparked the development of a series of statistical tools that specifically allows for spatial and subsequently spatial-temporal ...
  • The development of the quaternion normal distribution 
    Loots, Mattheus Theodor (University of Pretoria, 2010-12-28)
    In this dissertation an overview on the real representation of quaternions in distribution theory is given. The density functions of the p-variate and matrix-variate quaternion normal distributions are derived from first ...
  • Parameter structures in the exponential class 
    Strydom, Hendrina Fredrika (University of Pretoria, 2011)
    Maximum likelihood estimation of parameter structures in the exponential class is considered by using a procedure for maximum likelihood estimation under constraints. This procedure does not require maximization of the ...
  • Improved nonparametric control charts for location based on runs-rules 
    Kritzinger, Pierre (University of Pretoria, 2011)
    Numerous nonparametric or distribution-free control charts have been proposed and studied in recent years; see, for example, the overview articles by Chakraborti et al. (2001), Chakraborti and Graham (2007) and Chakraborti ...
  • Statistical properties of forward selection regression estimators 
    Thiebaut, Nicolene Magrietha (University of Pretoria, 2011)
    In practice, when one has many candidate variables as explanatory variables in multiple regression, there is always the possibility that variables that are important determinants of the response variable might be omitted ...
  • Theory and applications of univariate distribution-free Shewhart, CUSUM and EWMA control charts 
    Graham, Marien Alet (University of Pretoria, 2011-02-24)
    Statistical quality control charts originated in the late 1920’s by Shewhart (1926, 1931 and 1939). Their applications in various disciplines have been ever-increasing. Although most control charts are distribution-based, ...
  • Bimatrix variate distributions of Wishart ratios with application 
    Ehlers, Rene (University of Pretoria, 2011-09-23)
    The focus of this study is the development of a group of bimatrix variate beta distributions with bounded domain for the central and noncentral cases. They are constructed from different dependent Wishart ratios. Exact ...
  • Statistical properties of forward selection regression estimators 
    Thiebaut, Nicolene Magrietha (University of Pretoria, 2011-11-18)
    Please read the abstract in the dissertation.
  • Permutation procedures for ANOVA, regression and PCA 
    Storm, Christine (University of Pretoria, 2012)
    Parametric methods are effective and appropriate when data sets are obtained by well-defined random sampling procedures, the population distribution for responses is well-defined, the null sampling distributions of suitable ...