Science Journal of Applied Mathematics and Statistics

Archive

Volume 9, Issue 1, February 2021

  • Eco-Epidemiological Modelling and Analysis of Prey-Predator Population

    Abayneh Fentie Bezabih, Geremew Kenassa Edessa, Koya Purnachandra Rao

    Issue: Volume 9, Issue 1, February 2021
    Pages: 1-14
    Received: 10 November 2020
    Accepted: 4 December 2020
    Published: 23 February 2021
    DOI: 10.11648/j.sjams.20210901.11
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    Abstract: In this paper, prey-predator model of five Compartments are constructed with treatment is given to infected prey and infected predator. We took predation incidence rates as functional response type II and disease transmission incidence rates follow simple kinetic mass action function. The positivity, boundedness, and existence of the solution of th... Show More
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  • Constant Stress Partially Accelerated Life Tests for Extended Generalized log Logistic Distribution Based on Type I Censored Competing Risks Data

    Elgabry Gamalat, Rezk Hoda

    Issue: Volume 9, Issue 1, February 2021
    Pages: 15-19
    Received: 22 January 2021
    Accepted: 7 February 2021
    Published: 23 February 2021
    DOI: 10.11648/j.sjams.20210901.12
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    Abstract: As a result of technology improvement getting information about products and materials lifetimes under usual conditions. Therefore accelerated life testing or partially accelerated life testing usually are used to truncate the tests survives. The test items under accelerated life testing run under accelerated conditions and partially life tests run... Show More
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  • Nonparametric Penalized Spline Model Calibrated Estimator in Complex Survey with Known Auxiliary Information at Both Cluster and Element Levels

    Nthiwa Janiffer Mwende, Ali Salim Islam, Pius Nderitu Kihara

    Issue: Volume 9, Issue 1, February 2021
    Pages: 20-32
    Received: 27 November 2020
    Accepted: 16 February 2021
    Published: 10 March 2021
    DOI: 10.11648/j.sjams.20210901.13
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    Abstract: The present study uses penalized splines (p- spline) to estimate the functional relationship between the survey variable and the auxiliary variable in a complex survey design; where a population divided into clusters is in turn subdivided into strata. This study has considered a case of auxiliary information present at two levels; at both cluster a... Show More
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