ABSTRACT This work investigated the volatility clustering of exchange rate of Nigeria Naira against the United States of America Dollar. The data used in the present study consist of the monthly exchange rates of the Naira to Dollar from January 1999 to December 2012 obtained from the Central Bank of Nigeria. The main focus is to provide a proper understanding of the theory and empirical working of GARCH family models and to determine volatility clustering. The EGARCH(2,2) model was selected...
ABSTRACT The dispersion parameter in proportions occurring in toxicology, biology, clinical medicine and epidemiology is important in making inference regarding the regression parameters on the mean. Most data in form of proportions often exhibit excess variation (extra-dispersion). This can arise when the data is from different sub-populations (clusters) or when the assumption of independence is violated. The Beta-Binomial distribution has been applied to model over-dispersion in binary res...
ABSTRACT The idea of pool testing originated from Dorfman during the World War II as an economical method of testing blood samples of army inductees in order to detect the presence of infection. Dorfman proposed that rather than testing each blood sample individually, portions of each of the samples can be pooled and the pooled sample tested first. If the pooled sample is free of infection, all inductees in the pooled sample are passed with no further tests otherwise the remaining portions o...
ABSTRACT Recently, there has been a considerable attention on modeling overdispersed binomial data that occur in toxicology, biology, clinical medicine, epidemiology and other related fields using a class of Binomial mixture distribution. Specifically, Beta-Binomial (BB) and KumaraswamyBinomial distribution (KB) in this class have been extensively used to model the overdispersed Binomial outcomes. A new three parameter binomial mixture distribution namely, McDonald Generalized Beta-Binomial ...
ABSTRACT Modelling of stock market data has witnessed a significant increase in literature over the past two decades. Focus has been mainly on the use of the ARCH model with its various extensions due to its ability to capture heteroscedasticity prevalent in the financial and monetary variables. However, other suitable models like the bilinear models have not been exploited to model stock market data so as to determine the most efficient model between the ARCH and bilinear models. The underl...
ABSTRACT Screening of pooled urine specimen was suggested during the Second World War as a method for reducing the cost of detecting syphilis in U.S. soldiers. Recently, pooling has been used in epidemiological studies for screening of human immunodeficiency virus HIV/AIDS antibody to help curb the spread of the virus. Pooling reduces the cost but also – and more importantly – offers a feasible way to lower the misclassifications associated with labeling specimens when imperfect tests are...
ABSTRACT Modeling of time series with many observations has been a focus of considerable research both in theoretical and empirical applications over the last three decades. However, the problem of short time series modeling has not so far been adequately studied both in theory and practical applications, despite the fact that many real life situations involve fewer observations leading to short time series. This calls for making use of appropriate estimation techniques in order to come up wi...
ABSTRACT The idea of pool testing originated from Dorfman during the World War II as an economical method of testing blood samples of army inductees in order to detect the presence of infection. Dorfman proposed that rather than testing each blood sample individually, portions of each of the samples can be pooled and the pooled sample tested first. If the pooled sample is free of infection, all inductees in the pooled sample are passed with no further tests otherwise the remaining portions of...
ABSTRACT Benue State Tractor Hiring Agency (BENTHA) is usually confronted with the problem of determining the optimum number of tractors to be allocated to different zones in the state. The number of tractors allocated to a zone is normally decided without any proper study of tractor needs of the zones. Sometimes allocation is based on merely political considerations. The problem of allocation is formulated and heuristic procedures are applied to optimally allocate the limited tractors.
ABSRACT Primarily, the project has focused on finding out the Online Buying trends and behavior of Maasai Mara university consumers with an age range of 18- 25 years. The proposed primary objective of the study was further divided into secondary objectives with an aiming of finding detailed information on the research topic. Precisely, information regarding buyer’s buying frequency, average spending, and famous product purchase was gathered. Since the objectives were quantifiable, a quantit...
ABSTRACT The research was conducted to find out whether applying fertilizer to tea at specific season of the year will affect the level of antioxidant. The main objective of the research was to determine the correlation between the level of antioxidant in tea and the season at which fertilizer was applied. Secondary data was obtained from James Finlay Kenya Limited with the authority of Applied Research Department. Trials of NPK fertilizer were conducted during the four seasons of the year: d...
ABSTRACT A measure of dispersion is a statistical tool used to define the distribution of various datasets mainly from measures of central tendency. Some notable measures of dispersion from the mean are; average deviation, mean deviation, variance, and standard deviation. However, from previous studies, it has been established that the aforementioned measures are not absolutely perfect in estimating average variation from the mean. For instance, variance gives estimates which are of different...
ABSTRACT Human Resource Management (HRM) practices will continually attract the attention of researchers in pursuit of better ways to counter the emerging challenges that can undermine the growth of the organizations. The research will be carried out to examine the influence of human resource management practices on the growth of Savings and Credit cooperative societies (Sacco societies) in South Rift Region. The study will examine the relationship among the factor variables which are; select...
ABSTRACT Income accrued from Retirement Benets Fund is an exceptionally important component of every working individual's life cycle globally. The major sources of such income are: unfunded state pensions; funded private pensions; mandatory schemes; and post-retirement work. The urgency and importance has made many countries to give it considerable attention by enacting enabling laws and policies to safeguard it. In Kenya, steps have been made by establishing the National Social Security Fund...
Abstract Trypanosomiasis is a debilitating disease which is a major constraint to livestock production in sub-Saharan Africa. It leads to loss of productivity in animals and without treatment it is frequently fatal. The economic and social repercussions it causes in areas where it is endemic, makes its control a priority operation. In this study we formulate three models; a basic model to understand the transmission dynamics of the trypanosomiasis in a cattle population, a model with treatmen...