Department Of Social Sciences

Permanent URI for this community

https://ir.unilag.edu.ng/handle/123456789/5706

Browse

Browsing Department Of Social Sciences by Author "Adewara, J.A."

Now showing 1 - 5 of 5
  • Item
    Open Access
    Minimax Multivariate Control Chart Using a Polynomial Function
    (Applied Mathematics, 2011) Adewara, J.A.; Adekeye, K.S; Asiribo, O.E; Adejuyigbe, S.B
    Minimax control chart uses the joint probability distribution of the maximum and minimum standardized sample means to obtain the control limits for monitoring purpose. However, the derivation of the joint probability distribution needed to obtain the minimax control limits is complex. In this paper the multivariate normal distribution is integrated numerically using Simpson’s one third rule to obtain a non-linear polynomial (NLP) function. This NLP function is then substituted and solved numerically using Newton Raphson method to obtain the control limits for the minimax control chart. The approach helps to overcome the problem of obtaining the joint probability distribution needed for estimating the control limits of both the maximum and the minimum statistic for monitoring multivariate process.
  • Item
    Open Access
    Multivariate Generalized Poisson Distribution for Interference on Selected Non-Communicable Diseases in Lagos State, Nigeria
    (Journal of Modern Applied Statistical Methods, 2012) Adewara, J.A.; Mbata, U.A
    Multivariate Generalized Poisson Distribution (MGPD) models are applied to make inferences regarding non-communicable diseases, diabetes, hypertension, stroke and ulcer in Lagos State, Nigeria. The generalized Poisson distribution is employed due to its usefulness in modeling count data in the presence of either over- or under- dispersion. Results show that the correlation between ulcer and stroke is not significant. Other pairwise comparisons of diseases are significant, thus implying that a patient who suffers from diabetes or stroke has a high propensity to also be hypertensive
  • Item
    Open Access
    New technologies and science teachers education within the context of distance learning: A case study for the University of Lagos
    (Turkish Online Journal of Distance Education-TOJDE, 2015-07) Adewara, J.A.; Lawal, O.O
    The Open and Distance Learning (ODL) education for science teachers is seen as a solution to the problems of equity and access to teacher education in Nigeria. It is used to provide cost-effective Science Teacher Education, and to train large numbers of teachers within a short period of time. The need for training science teachers through ODL systems is becoming more critical and necessary. The study explored the contribution of Science Teacher Education within the context of Open and Distance Learning in the following areas: time spent on electronics devices, skill development in the use of computer technologies and applications, Extent of use of IT in courses and course management system features. The study used a survey method. Stratified sampling technique was adopted. Two hundred and fifty (250) questionnaires were sent out and one hundred and seventy three (173) were returned. The result shows that that there is a significant positive correlation between science teachers education within the context of Open Distance Learning and time spent on electronics devices, skill development in the use of computer technologies and application, Extent of use of IT in courses and course management system features at R=0.688, 0.625, 0.165, 0.607, 0.500, with the p value of < 0.05 level of significance. This result implies that increase on each of these variables will further enhance Science Teacher Education.
  • Item
    Open Access
    A Statistical Analysis of the Performance Distance Learning Students and the Full-Time Students at the University of Lagos
    (American Journal of Business Education, 2010) Adewara, J.A.; Adeleke, I.A.; Ogundeji, R.K.; Ahani, E.B.
    The study compares the performance of distance learning students with full-time students in a traditional face-to-face learning environment. This study is one aspect of a larger research project designed to gain insight into factors that may influence the performance of distance learning students. The data used in the study represent the graduating GPA (Grade Point Average) and CGPA (Cumulative Grade Point Average). The result showed that students of Distance Learning Institute (DLI) performed better in business administration than the mainstream students, while the mainstream accounting students perform better than the DLI accounting students. Results indicated that there was a statistically significant difference in final grades of these groups of students
  • Item
    Open Access
    Survival Estimation Using Bootstrap, Jackknife and K-Repeated Jackknife Methods
    (Journal of Modern Applied Statistical Methods, 2015-11) Adewara, J.A.; Mbata, U.A
    Three re-sampling techniques are used to estimate the survival probabilities from an exponential life-time distribution. The aim is to employ a technique to obtain a parameter estimate for a two-parameter exponential distribution. The re-sampling methods considered are: Bootstrap estimation method (BE), Jackknife estimation method (JE) and the k-repeated Jackknife estimation method (KJE). The methods were computed to obtain the mean square error (MSE) and mean percentage error (MPE) based on simulated data. The estimates of the two-parameter exponential distribution were substituted to estimate survival probabilities. Results show that the MSE value is reduced when the K–repeated jackknife method is used.