Browsing Research Articles (Statistics) by UP Author "Crowther, N.A.S. (Nicolaas Andries Sadie), 1944-"

Browsing Research Articles (Statistics) by UP Author "Crowther, N.A.S. (Nicolaas Andries Sadie), 1944-"

Sort by: Order: Results:

  • Maximum likehood estimation of parameter structures for the Wishart distribution using constraints 
    Strydom, H.F. (Hendrina Fredrika); Crowther, N.A.S. (Nicolaas Andries Sadie), 1944- (Elsevier, 2013-04)
    Maximum likelihood estimation under constraints for estimation in the Wishart class of distributions, is considered. It provides a unified approach to estimation in a variety of problems concerning covariance matrices. ...
  • Maximum likelihood estimation for multivariate normal samples : theory and methods 
    Strydom, H.F. (Hendrina Fredrika); Crowther, N.A.S. (Nicolaas Andries Sadie), 1944- (South African Statistical Association, 2012)
    Maximum likelihood estimation of parameter structures in the case of multivariate normal samples is considered. The procedure provides a new statistical methodology for maximum likelihood estimation which does not require ...
  • A maximum likelihood estimation procedure for binary data from cross-over studies 
    Matthews, G.B. (Glenda Beverley); Crowther, N.A.S. (Nicolaas Andries Sadie), 1944- (South African Statistical Association, 2011)
    A maximum likelihood estimation procedure is presented for the expected frequencies when modelling binary data from two-period cross-over studies. This procedure provides a simple approach to parameter estimation in ...
  • Multivariate normal estimation : the case (n < p) 
    Strydom, Nina; Crowther, N.A.S. (Nicolaas Andries Sadie), 1944- (Taylor and Francis, 2018)
    Estimation in the multivariate context when the number of observations available is less than the number of variables is a classical theoretical problem. In order to ensure estimability, one has to assume certain constraints ...