Now showing items 31-36 of 36
Estimating the window period and incidence of recently infected HIV patients.
(Stellenbosch : University of Stellenbosch, 2009-03)
Incidence can be defined as the rate of occurence of new infections of a disease like HIV and is an useful estimate of trends in the epidemic. Annualised incidence can be expressed as a proportion, namely the number of ...
Value at risk and expected shortfall : traditional measures and extreme value theory enhancements with a South African market application
(Stellenbosch : Stellenbosch University, 2013-12)
ENGLISH ABSTRACT: Accurate estimation of Value at Risk (VaR) and Expected Shortfall (ES) is critical in the management of extreme market risks. These risks occur with small probability, but the financial impacts could be ...
Confidence intervals for estimators of welfare indices under complex sampling
(Stellenbosch : University of Stellenbosch, 2010-03)
ENGLISH ABSTRACT: The aim of this study is to obtain estimates and confidence intervals for welfare indices under complex sampling. It begins by looking at sampling in general with specific focus on complex sampling and ...
Application of cluster analysis and multidimensional scaling on medical schemes data
(Stellenbosch : Stellenbosch University, 2008-12)
Cluster analysis and multidimensional scaling (MDS) methods can be used to explore the structure in multidimensional data and can be applied to various fields of study. In this study, clustering techniques and MDS methods ...
Bayesian approaches of Markov models embedded in unbalanced panel data
(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: Multi-state models are used in this dissertation to model panel data, also known as longitudinal or cross-sectional time-series data. These are data sets which include units that are observed across two ...
PCA and CVA biplots : a study of their underlying theory and quality measures
(Stellenbosch : Stellenbosch University, 2013-03)
ENGLISH ABSTRACT: The main topics of study in this thesis are the Principal Component Analysis (PCA) and Canonical Variate Analysis (CVA) biplots, with the primary focus falling on the quality measures associated with ...