Science Journal of Applied Mathematics and Statistics

Volume 10, Issue 4, August 2022

  • Calibration Estimators for Population Mean with Subsampling the Nonrespondents Under Stratified Sampling

    Iseh Matthew Joshua, Bassey Mbuotidem Okon

    Issue: Volume 10, Issue 4, August 2022
    Pages: 45-56
    Received: 7 August 2022
    Accepted: 27 August 2022
    Published: 16 September 2022
    DOI: 10.11648/j.sjams.20221004.11
    Abstract: The existence of nonresponse in survey sampling has engendered inconsistencies in the estimation of population parameter. Such estimation, being characterized by nonresponse bias has become a rule rather than the exception in survey sampling, and this has been long acknowledged in the literature. Several authors have come up with different techniqu... Show More
  • Approximation of Functions Using Fourier Series and Its Application to the Solution of Partial Differential Equations

    Desta Sodano Sheiso

    Issue: Volume 10, Issue 4, August 2022
    Pages: 57-84
    Received: 18 June 2022
    Accepted: 1 September 2022
    Published: 19 September 2022
    DOI: 10.11648/j.sjams.20221004.12
    Abstract: Fourier series are a powerful tool in applied mathematics; indeed, their importance is twofold since Fourier series are used to represent both periodic real functions as well as solutions admitted by linear partial differential equations with assigned initial and boundary conditions. The idea inspiring the introduction of Fourier series is to appro... Show More