Recently, statisticians have been exploring the generalization and extension of classes of distributions to make them more flexible for data analysis. There are a lot of data sets that are either extremely skewed, bimodal, bathtub or have heavy tails. However, inverse exponential distribution cannot model data sets that exhibit these features properly. In this study, a new family of inverse exponential distribution called T-inverse exponential {Y} family based on quantile function approach ha...
Malaria has become a common disease that affects the health of every household. The canker is expected to continue with its devastating effects for a long period given the absence of sufficient interventions to mitigate it. Several researches have been undertaken to investigate the pattern of malaria cases in Ghana. This study modeled the effects of climatic variables on monthly malaria cases in Wenchi Municipal using Poisson Switching Regression Model. Secondary data on malaria from January,...
Pneumonia is an infection of the lungs. It causes inflammation of the alveoli making it fill with fluid, causing difficulty in breathing and reduces oxygen intake. It is the leading cause of deaths in children worldwide. In this study, secondary data on monthly pneumonia cases collected from the disease control unit from 2015 to 2020 of the Builsa North Municipality was modeled using discrete-time Markov chain modeling. The data was grouped into low, moderate and high states of the pneumonia ...
The role of weight-for-age babies in the early childhood and its effects on later lives of children cannot be over emphasized. Birth weight according to Murthy (1991) is a key indicator of the incidence of infant mortality and thus, a reflection of the socio-economic development of a country. The main objective is to use statistical models to assess the change in weight of children over time and to investigate whether maternal characteristics such as marital status, educational level, religio...
The accident risks of drivers and the factors affecting the risks were analyzed using survival models. The data consisted detailed records of fatal accidents in the years 2007 - 2009, generated by the Motor Traffic and Transport Unit (MTTU) of the Ghana Police Service, Northern region. The data on fatal accidents contained 398 drivers. The objectives of the study included both analysis and explanation of driver accident risk factors and investigation of how survival modeling method can be use...
Acquired Immune deficiency Syndrome (AIDS) is a disease caused by a virus known as Human Immunodeficiency virus (HIV). This virus attacks a person's immune system (white blood cells) and as such weakens the immune system and making the person vulnerable to opportunistic diseases e.g. tuberculosis, diarrhoea, to mention a few. HIV was first diagnosed more than twenty years ago and up to now there is no known cure for the disease. The rate at which HIV is spreading in sub-Sahara Africa is so hi...
HIV/AIDS was first recognized in the early 1980's and since then has affected humankind in different ways across all the continents. It has been a wake-up call to scientists, health experts, NGOs, individuals, and other stakeholders to handle such a menace since the virus depletes the CD4 T-lymphocytes which is a major cell of maintaining the body immune system against various infectious diseases. A secondary data of 142 persons living with HIV/AIDS on antiretroviral therapy was obtained from...
Cereals are important crops that feed over billions of households worldwide. They have been used extensively for both human consumption and feeding of livestock. In Ghana, cereals such as rice, maize and millet are staple food of great socio-economic importance and they contribute significantly to agriculture Gross Domestic Product (GDP) and the economy of the country. In this study, we developed an ARIMA (p, q)-GARCH (m, s) model to model the volatility of the returns of rice, maize and mill...
Power production and distribution in Ghana is ever more becoming erratic and expensive, both for the power producer and the consumer. It is in this regard that an investigation of hydrothermal power generation scheduling is undertaken for Volta River Authority (VRA) of Ghana. The goal of the study was to determine an optimal power production schedule that meets daily load demands at minimum cost of production and also ascertain the marginal cost of producing electricity per day and therefore ...
The main objective of this study was to apply estimation maximization concept to assess residuals through structural equation modelling. This was achieved through simulation setup. Data was obtained from test scores of some selected course lecturers of Kumasi Technical University to validate the results from the simulation. The results showed that the estimated residuals of the measurement errors using all three estimators correlate negatively with the estimated residuals associated with meas...
The impacts of extremely high temperatures on plants, human beings and animals’ health have been studied in several parts of the world. However, extreme events are uncommon and have only attracted attention recently. In this study, extreme temperature behaviour was modelled through the application of extreme value theory using maximum monthly temperatures over a 32 years period. Data on monthly maximum temperature from the Upper East Region were modelled using generalized extreme value (GEV...
The inverted Kumaraswamy distribution has a drawback in modeling lifetime data which show non-monotone failure rates. Thus, a new class of distributions called power series inverted Kumaraswamy distribution was developed by compounding the inverted Kumaraswamy distribution with zero truncated power series distribution with the goal of making it more flexible. The new class of distributions were developed using the stochastic representation Z min (T1,T2 ,...TN ) which is the time to the fi...
Erectile dysfunction is defined as the continuous inability of a man to attain a satisfactory erection for a successful sexual intercourse. Female sexual dysfunction is also defined as the inability of a woman to enjoy a complete sexual activity. A twoway between groups MANOVA was performed to investigate whether there is a significant difference between male and female, and married and single. Five dependent variables were used: age, creatinine levels, duration of diabetes, glucose levels an...
A new class of distributions, called complementary power series exponentiated Nadarajah-Haghighi distribution was developed in this study by compounding the exponentiated Nadarajah-Haghighi distribution with zero truncated power series distributions. The new class of distributions were developed using the concepts of latent complementary risk scenario, in which the lifetime associated with a particular risk is not observable; rather we observe only the maximum lifetime value among all risks. ...
Pregnancy Induced hypertension (PIH) is a global concern that affect pregnant women usually after 20 weeks of gestation. It accounts for 5 to 10% of all pregnancies in relation to haemorrhage and infections. Clinicians and researchers are finding it difficult to comprehend the primary cause of this anomaly. The Upper East Region of Ghana has witnessed an upsurge in maternal mortality in 2016 and 2017 due to this precarious situation. Hence the need to investigate on some of the perceived risk...