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Author(s): Mohammed Anono Zubair, Abubakar Haruna.

Volume/Issue: Volume 8 , Issue 2 (2025)

Abstract:

The need to provide an acceptable model and forecast for stock prices of solid minerals in Nigeria is valuable for investors and analysts. It will empower them to better understand and manage the associated risks in stock price movements. This study aims to model and forecast the volatility of stock prices of solid minerals, like gold, tin, and zinc. The data utilized in this study was sourced from the Central Bank of Nigeria and Nigeria Stock Exchange. It is the monthly stock prices for selected solid minerals like; Gold, Tin, and Zinc. Multivariate GARCH models such as the VECH, BEKK, Diagonal VECH and Diagonal BEKK model were employed to provide the needed multivariate volatility modeling. The findings reveal that, on average, investors experienced positive returns, and a non-symmetric distribution. It was also discovered that intricate patterns exist within the volatility dynamics of these stocks. Volatility clustering, ARCH effects, and the persistence of volatility shocks over time was identified, emphasizing the non-random nature of stock returns volatility. It is recommended that investors and analysts carefully consider the implications of volatility clustering, ARCH effects, and persistence in volatility shocks when making investment decisions in the stock market, particularly regarding Gold, Tin, and Zinc stocks.

Keywords:

ARCH, Autoregression, Bekk-Garch, GARCH, Heteroskedastic, IGARCH, Skewness, Stationarity, VECH.

No. of Downloads: 0

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Author(s): Alaba Akinleye Obabire, Okiemute Gregory Agadaga.

Volume/Issue: Volume 8 , Issue 2 (2025)

Abstract:

Chi-square test of independence was used in this study to determine associations between establishment of Federal Polytechnic, Orogun and various important socio-economic determinants. Also, to know the significant contribution of the establishment of the Federal Polytechnic, Orogun on the socio-economic development of Orogun in Ughelli North Local Government Area of Delta State in Nigeria. Questionnaire was administered on 1000 respondents randomly selected from various categories of people in the community. Data collected was presented and analyzed using Statistical Package for Social Science, (SPSS) and Microsoft Excel. Most importantly various socio-economic impacts of this great Polytechnic is established in this study.

Keywords:

Acquisition, Economic, Establishment, Institution, Questionnaires.

No. of Downloads: 0

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Author(s): Obodo O. E., Umeh E. U..

Volume/Issue: Volume 8 , Issue 2 (2025)

Abstract:

This paper introduces a new lifetime probability distribution called the Truncated Pseudo-Lindley-Poisson Distribution (TPLPD), which generalizes the Pseudo-Lindley Distribution and the Poisson distribution. The distribution is a flexible distribution used to model count data with varying degrees of dispersion. This study also investigates the performance of Maximum Likelihood Estimation (MLE) for estimating the parameters of the Truncated Pseudo Lindley Poisson Distribution (TPLPD) through a simulation-based approach. The variance of MLE estimates is assessed under various sample sizes and parameter combinations. The results of the simulation study reveal that the variance of MLE estimates decreases as the sample size increases, and that the choice of parameter combinations significantly affects the variance.

Keywords:

Truncated Pseudo-Lindley- Poisson distribution, Maximum Likelihood Estimation, Variance, Simulation Study.

No. of Downloads: 0

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Author(s): Editor in Chief.

Volume/Issue: Volume 8 , Issue 1 (2025)

Abstract:

African Journal of Mathematics and Statistics Studies (Volume 8, Issue 1, Cover Pages)

No. of Downloads: 0

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Author(s): Essang Samuel Okon, Kolawole Olamide Michael, Francis Runyi Emmanuel, Ibeh Kingsley Kelechi, Ante Jackson Efiong, Ayuk Philia Agam, Okeke Stephen Ikenna, Otobi Augustine Ogbaji, Akpotuzor Sylvia Adaobi, Urekor Simon Ntol, Essien Daniel Edison, Ita Benedict Iserom, Akpan Christian Solomon.

Volume/Issue: Volume 8 , Issue 2 (2025)

Abstract:

The Damped Oscillatory Logistic Growth (DOLG) Model is introduced as a novel hybrid framework that integrates oscillatory dynamics, damping, and logistic growth into a single differential equation. This model extends classical systems such as the harmonic oscillator, logistic growth equation, and damped systems by combining their key features into a unified framework. Numerical solutions reveal rich dynamical behaviors, including damped oscillations, stabilization to carrying capacity, and phase-dependent growth patterns. The system’s stability is analytically and numerically confirmed, with trajectories converging to the non-trivial equilibrium (x,v) = (K,0) for all parameter regimes. The effects of damping, growth rate, and oscillation frequency are explored through time series and phase portraits, demonstrating the model’s versatility in capturing complex phenomena. Potential applications span ecology, economics and engineering, offering new insights into oscillating populations, cyclical growth, and mechanical systems with growth constraints. This study lays the groundwork for future research on hybrid dynamical systems and their interdisciplinary applications.

Keywords:

Damping coefficient; oscillatory behavior; system stability; eigenvalue analysis; phase portraits; nonlinear dynamics.

No. of Downloads: 0

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Author(s): Ukoha Joseph Kalu, Mahmud Shamsuddeen Muhammed, Musa Idris Zainab, Zahid Ibrahim Shuaibu.

Volume/Issue: Volume 8 , Issue 1 (2025)

Abstract:

This paper introduces a Block Hybrid Method for solving general second-order ordinary differential equations (ODEs) with initial value problems. The method is based on a continuous formulation of the second-order hybrid generalized Adams method, incorporating one off-grid point per step. Discrete schemes are derived from the continuous form and its first derivative, forming the block methods. Analysis shows the method is consistent, zero-stable, and convergent. Numerical results highlight its superiority over existing methods.

Keywords:

Block Hybrid Method, Consistency, Zero-stability, Convergent, and Second Derivative.

No. of Downloads: 0

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Author(s): Emwinloghosa Kenneth Guobadia, Jophet Ewere Okoh, Joel Isreal Eviano, Adebisi Ajibola Monsuru.

Volume/Issue: Volume 8 , Issue 2 (2025)

Abstract:

The paper projects innovating means to probability modeling using integration method and the concept of normalization. It brings to light a probability distribution obtained by combining a probability density function of a distribution and a cumulative distribution function of another continuous probability model, to produce a triangular trend and a half bell-curve trend. Gumbel and exponential distributions are the root-distributions used for this development. The properties of the distribution include moments and related measures, and estimation, studied alongside simulation.

Keywords:

Gumbel distribution, Exponential distribution, Product arrangement, Triangular trend.

No. of Downloads: 0