American Journal of Theoretical and Applied Statistics

Volume 10, Issue 1, January 2021

  • Analyzing the Impact of COVID 19 on Global Trends and Predicting Future Cases

    Gyeongseung Han, Jeewon Han, Seungmin Han, Hyunkyung Jeong

    Issue: Volume 10, Issue 1, January 2021
    Pages: 1-8
    Received: 21 November 2020
    Accepted: 22 December 2020
    Published: 12 January 2021
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    Abstract: COVID-19 is a highly contagious, potentially lethal respiratory disease caused by a strain of coronavirus. Utilizing sets of data collected by Johns Hopkins University, this research paper analyzes the global trends of COVID-19 and the pandemic’s effect on the global economy. The aim of this paper is to provide accurate information of COVID-19 thro... Show More
  • Theoretical Properties of New Error Innovation Distribution on GARCH Model

    Olayemi Michael Sunday, Olubiyi Adenike Oluwafunmilola

    Issue: Volume 10, Issue 1, January 2021
    Pages: 9-13
    Received: 21 December 2020
    Accepted: 31 December 2020
    Published: 12 January 2021
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    Abstract: In the last decades, many error innovations have been introduced based on different modification techniques. One of the vital methods in estimating the true parameter of any volatility models is error innovation distribution, since volatility is affected by reaction from the stock market because of political recession, insecurity, constant power fa... Show More
  • Maximum Likelihood Estimation for a Progressively Type II Censored Generalized Inverted Exponential Distribution via EM Algorithm

    Karuoya Grace Njeri, Edward Gachangi Njenga

    Issue: Volume 10, Issue 1, January 2021
    Pages: 14-21
    Received: 20 December 2020
    Accepted: 11 January 2021
    Published: 22 January 2021
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    Abstract: The Generalized Inverted Exponential (GIE) distribution is a mixed lifetime model used in a number of fields such as queuing theory, testing of products or components and modelling the speed of winds. The study aims to focus on the determination of maximum likelihood estimates of GIE distribution when the test units are progressively (type II) cens... Show More
  • Estimating Population Total Using Machine Learning Logistic Regression: COVID-19 Pandemic Challenges Perspective

    Thomas Mageto

    Issue: Volume 10, Issue 1, January 2021
    Pages: 22-31
    Received: 8 January 2021
    Accepted: 15 January 2021
    Published: 22 January 2021
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    Abstract: The estimation of the population total in undeveloped and developing countries in the recent past has attracted a lot of interest to many researchers due to the sole purpose of planning resource allocation, personnel training and infrastructure in social, health, transport, communication and education. The comprehensive census survey in many countr... Show More
  • I-Optimal Axial Designs for Four Ingredient Concrete Experiment

    Njoroge Elizabeth Wambui, Koske Joseph, Mutiso John

    Issue: Volume 10, Issue 1, January 2021
    Pages: 32-37
    Received: 13 November 2020
    Accepted: 1 December 2020
    Published: 28 January 2021
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    Abstract: Stakeholders in the construction industry work towards obtaining optimal concrete mixes with an aim of producing structures with the best compressive strength. In many instances, Kenya has witnessed collapse of buildings leading to death and huge financial loses, which has been associated largely to poor concrete mixes. This paper aims at evaluatin... Show More
  • The Two-Dimensional Infinite Heisenberg Classical Square Lattice: Zero-Field Partition Function and Correlation Length

    Jacques Curély

    Issue: Volume 10, Issue 1, January 2021
    Pages: 38-62
    Received: 13 January 2021
    Accepted: 6 February 2021
    Published: 10 February 2021
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    Abstract: The nonlinear σ-model has known a new interest for it allows to describe the properties of two-dimensional quantum antiferromagnets which, when properly doped, become superconductors up to a critical temperature notably high compared to other types of superconducting materials. This model has been conjectured to be equivalent at low temperatures to... Show More
  • Principal Component Analysis of Birth Weight of Child, Maternal Pregnancy Weight and Maternal Pregnancy Body Mass Index: A Multivariate Analysis

    Kindu Kebede Gebre

    Issue: Volume 10, Issue 1, January 2021
    Pages: 63-71
    Received: 19 October 2020
    Accepted: 28 October 2020
    Published: 23 February 2021
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    Abstract: Background: Birth weight, maternal body mass index and maternal weight is perhaps the most important and reliable indicator for neonatal and infant survival as well as their physical growth and mental development. The main objective of this study was identifying the determinants of birth weight, maternal body mass index and maternal weight simultan... Show More
  • Studying Changes on Stock Market Transactions Using Different Techniques for Multivariate Time Series

    Ahmed Mohamed Mohamed Elsayed

    Issue: Volume 10, Issue 1, January 2021
    Pages: 72-88
    Received: 2 February 2021
    Accepted: 14 February 2021
    Published: 26 February 2021
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    Abstract: There are many studies dealt with univariate time series data, but the analysis of multivariate time series are rarely discussed. This article discusses the theoretical and numerical aspects of different techniques that analyze the multivariate time series data. These techniques are ANN, ARIMA, GLM and VARS models. All techniques are used to analyz... Show More