Research Journal in Mathematics, Econometrics and Statistics https://royalliteglobal.com/jmes <p style="text-align: justify;">Part of Royallite Global, <em>Research Journal in Mathematics, Econometrics and Statistics</em> is a multidisciplinary journal that aims at publishing original and peer-reviewed papers across the breadths of mathematics, econometrics and statistics. Emphasis is given to both theoretical and applied research papers dealing with the applications of mathematics, econometrics and statistics in solving problems in sciences, social sciences, business, finance, economics and mathematics related topics. The journal publishes research and review articles, short communications, editorials, book reviews, case reports, and research notes.</p> en-US <p>This work is licensed under a <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" rel="license">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.</p> <p class="copyright-statement">This open-access article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license.</p> <p class="licensing"><strong>You are free to:</strong> Share — copy and redistribute the material in any medium or format.</p> <p class="licensing"><strong>Adapt</strong> — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. </p> <p class="licensing"><strong>Under the following terms:</strong> Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. </p> <p class="licensing"><strong>No additional restrictions:</strong> You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.</p> Lynda.smail@gmail.com (Linda Smail) ojwang@royalliteglobal.com (Amos Ojwang) Thu, 11 Feb 2021 13:30:39 +0000 OJS 3.2.1.1 http://blogs.law.harvard.edu/tech/rss 60 Influence of visuospatial models construction and usage on college students’ academic achievement in molecular and hybridization geometries in Ghana https://royalliteglobal.com/jmes/article/view/541 <p>This action research study examines the visual-spatial model’s effects on science students’ performance in molecular and hybridization geometries. Although the diagnostic test revealed both groups showed similar conceptual abilities and challenges, the studies’ outcome showed that the visuospatial model’s approach to teaching the molecular and hybridization geometries enhanced the student’s conceptual understanding. The visuospatial model representations allow students to learn about the abstract subject matter of disciplines’ scientific knowledge. Therefore, the use of visuospatial models in teaching enhances students' visual imaginations and thoughts about concepts.</p> Lawrence Sarpong, Alexander Obiri Gyampoh, Benjamin Aidoo, Peter Haruna, Mensah Kofi Copyright (c) 2021 ALEXANDER OBIRI GYAMPOH https://creativecommons.org/licenses/by-nc-sa/4.0 https://royalliteglobal.com/jmes/article/view/541 Sun, 27 Jun 2021 00:00:00 +0000 The benefits of teaching inverse regression alongside Least Squares Regression: Deeper comparisons for undergraduate research https://royalliteglobal.com/jmes/article/view/438 <p>This article is a continuation of the authors’ previously published article, later referred as “Part I”, and entitled, “The benefits of teaching inverse regression alongside Least Squares Regression: Graphical and numerical comparisons”. In Part I of this companion series, a foundational exposition comparing Inverse Regression and Least Squares Regression was undertaken using temperature data for thirty-two American cities. Deeper relationships are explored in this article (Part II of this series). The goal is to contrast the estimates provided by both regression methods using a collection of corollaries that are accessible to undergraduate mathematics and science students who have studied Least Squares Regression. Collectively, these two articles demonstrate how to purposely enhance a general discussion of Least Squares Regression.</p> Di Gao, Stephen M. Scariano Copyright (c) 2021 Research Journal in Mathematics, Econometrics and Statistics https://royalliteglobal.com/jmes/article/view/438 Thu, 11 Feb 2021 00:00:00 +0000 A new approach to co-ordinate distributed, worse-case scenario, linear quadratic optimization problems https://royalliteglobal.com/jmes/article/view/621 <p>A new approach for price driven coordination, large-scale, worst-case scenario linear quadratic optimization problems is presented. The approach is based on a reformulation of the dual problem associated<br>with the centralized robust optimization problem and to modify the co-ordination scheme in order to<br>incorporate determination of the worst-case scenario. The convergence of the algorithm is proven and<br>is guaranteed when the uncertainty set, the objective function and the constraints satisfy some specic<br>properties.</p> Babacar Seck, Fraser J. Forbes Copyright (c) 2021 Babacar Seck, Fraser J. Forbes https://creativecommons.org/licenses/by-nc-sa/4.0 https://royalliteglobal.com/jmes/article/view/621 Sat, 26 Jun 2021 00:00:00 +0000 Simple epidemic peaks of Coronavirus Disease in UAE, 2020 https://royalliteglobal.com/jmes/article/view/499 <p>In 1927, the Susceptible Infected and Recovered (SIR) Mathematical Modelling originally studied by Kermack and McKendrick (A contribution to the mathematical theory of epidemics’ in the Proceedings of the Royal Society London Ser. A), The paper became a classic in infectious disease epidemiology and has been cited innumerable times. Using the data offered by Ministry of Health and Prevention, the coefficient in the system of Ordinary Differential Equations that represent the United Arab Emirates’ SIR Mathematical Modelling of COVID-19, using Microsoft Excel, and MATLAB Software is used consequently to solve and graph the solution. The idea may be extended to be website calculator or a Mobile Application giving the Infection Rate Ro, the Contact Ratio q, and the Maximum percentage of population expected to be infected linked to the daily official data website.</p> Osama Rashwan Copyright (c) 2021 Osama Rashwan https://creativecommons.org/licenses/by-nc-sa/4.0 https://royalliteglobal.com/jmes/article/view/499 Fri, 25 Jun 2021 00:00:00 +0000