Browsing Statistics by Title
Now showing items 53-72 of 119
-
The management of missing categorical data : comparison of multiple imputation and subset correspondence analysis.
(2015)Missing data is a common problem in research and the manner in which this ‘missingness’ is managed, is crucial to the validity of analysis outcomes. This study illustrates the use of two diverse methods to handle, in ... -
Mean-square fractional calculus and some applications.
(2012)The fractional calculus of deterministic functions is well known and widely used. Mean-square calculus is a calculus that is suitable for use when dealing with second-order stochastic processes. In this dissertation we ... -
Measuring poverty and child malnutrition with their determinants from household survey data.
(2016)The eradication of poverty and malnutrition is the main objective of most societies and policy makers. But in most cases, developing a perfect or accurate poverty and malnutrition assessment tool to target the poor ... -
Meta-analysis of time to seizure relapse after a post-operative epilepsy surgery.
(2020)Epilepsy is a common disease world-wide whose suggested treatment vary from surgical to non-surgical. Although surgical treatments may be commonly recommended and successful in pharmacoresistant epilepsy for patients ... -
Meta-analysis with application to estimating combined estimators of effect sizes in biomedical research.
(2018)Meta-analysis is a statistical analysis that combines results from different independent studies. In meta-analysis a number of statistical methods are currently used for combining effect sizes of different studies. The ... -
Modeling environmental factors affecting the growth of eucalypt clones.
(2009)Tree growth is influenced by environment and genetic factors. The same tree growing in different areas will have different growth patterns. Trees with different genetic material, e.g. pine and Eucalyptus trees, growing ... -
Modeling financial data using the multivariate generalized hyperbolic distribution and copula.
(2015)Financial data usually possess some characteristics, such as volatility clustering, asymmetry, heavy and semi-heavy tails thus, making it difficult, if not impossible, to use Normal distribution to model them. Statistical ... -
Modeling the factors affecting cereal crop yields in the Amhara National Regional State of Ethiopia.
(2010)The agriculture sector in Amhara National Regional State is characterised by producing cereal crops which occupy the largest percentage (84.3%) of the total crop area cultivated in the region. As a result, it is imperative ... -
Modeling the smoking status of Kenya's males in the presence of missing data.
(2014)The current research, modeling smoking status in Kenya's males in the presence of missing data has three objectives: The first objective of this study is to identify factors, associated with smoking which will lead to ... -
Modelling a cluster randomised controlled trial to evaluate the impact of a cash incentivised prevention intervention to reduce teenage pregnancy among high school learners in rural KwaZulu-Natal, South Africa.
(2013)A third of adolescent girls fall pregnant before the age of 20 in South Africa, and this happens despite contraceptives and condoms being free and mostly accessi- ble. This thesis aims to evaluate the impact of a cash ... -
Modelling acute HIV infection using longitudinally measured biomarker data including informative drop-out.
(2009)Background. Numerous methods have been developed to model longitudinal data. In HIV/AIDS studies, HIV markers, CD4+ count and viral load are measured over time. Informative drop-out and the lower detection limit of viral ... -
Modelling CD4 count and Mortality in a cohort of patients initiated on HAART.
(2018)Longitudinally measured data and time-to-event or survival data are often associated in some ways, and are traditionally analyzed separately (Asar et al., 2015). However, separate analyses are not applicable in this case ... -
Modelling CD4+ count over time in HIV positive patients initiated on HAART in South Africa using linear mixed models.
(2009)HIV is among the highly infectious and pathogenic diseases with a high mortality rate. The spread of HIV is in uenced by several individual based epidemiological factors such as age, gender, mobility, sexual partner pro ... -
Modelling longitudinal binary disease outcome data including the effect of covariates and extra variability.
(2011)The current work deals with modelling longitudinal or repeated non-Gaussian measurements for a respiratory disease. The analysis of longitudinal data for non-Gaussian binary disease outcome data can broadly be modeled ... -
Modelling longitudinal counts data with application to recurrent epileptic seizure events.
(2010)The objectives of this thesis is to explore different approaches of modelling clustered correlated data in the form of repeated or longitudinal counts data leading to a replicated Poisson process. The specific application ... -
Modelling longitudinally measured outcome HIV biomarkers with immuno genetic parameters.
(2011)According to the Joint United Nations Programme against HIV/AIDS 2009 AIDS epidemic update, there were a total of 33.3 million (31.4 million–35.3 million) people living with HIV worldwide in 2009. The majority of the ... -
Modelling obesity risk factors among adult females in South Africa via a GLMM: classical and bayesian approaches.
(2016)Abstract available in PDF file. -
The modelling of African animal trypanosomiasis in KwaZulu-Natal, South Africa.
(2015)African animal trypanosomiasis (AAT), restricted to parts of the KwaZulu-Natal Province, is a disease which contributes signi cantly to the disease burden of cattle. Drug resistance is a constraint and dipping of cattle ... -
Modelling of volatility in the South African mining sector : application of ARCH and GARCH models.
(2016)Abstract available in PDF file. -
Modelling residential electricity usage within the eThekwini Municipal Area.
(2014)In this study we use linear mixed models to model residential electricity consumption within the eThekwini municipal area. Utilities around South Africa are required to estimate monthly electricity consumptions for each ...