Autor: Ferreira, Sandra - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Joint estimation for normal orthogonal mixed models
Autorzy:: de Jesus, Vera
Ferreira, Sandra
Mexia, João
Powiązania:: https://bibliotekanauki.pl/articles/730008.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: normal orthogonal mixed models
commutative Jordan algebras
meta-analysis
Opis:: Commutative Jordan algebras are used to express the structure of mixed orthogonal models and to derive complete sufficient statistics. From these statistics, UMVUE, (Uniformly Minimum Variance Unbiased Estimators), are derived for the relevant parameters, first of single models then of several such models. These models may correspond to experiments designed separately so our results may be seen as a contribution to this meta-analysis.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2007, 27, 1-2; 5-13
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Variance components estimation in generalized orthogonal models
Autorzy:: Fernandes, Célia
Ramos, Paulo
Ferreira, Sandra
Mexia, João
Powiązania:: https://bibliotekanauki.pl/articles/729930.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: generalized orthogonal models
variance components
generalized cross nesting designs
Opis:: The model $y = ∑_{j=1}^w X_j β̲_j + e̲$ is generalized orthogonal if the orthogonal projection matrices on the range spaces of matrices $X_j$, j = 1, ..., w, commute. Unbiased estimators are obtained for the variance components of such models with cross-nesting.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2007, 27, 1-2; 99-115
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Stable hypothesis for mixed models with balanced cross-nesting
Autorzy:: Ferreira, Dário
Mexia, João
Ferreira, Sandra
Powiązania:: https://bibliotekanauki.pl/articles/729670.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: generalized F tests
mixed balanced models
cross-nesting
Opis:: Stable hypothesis are hypothesis that may refer either for the fixed part or for the random part of the model. We will consider such hypothesis for models with balanced cross-nesting. Generalized F tests will be derived. It will be shown how to use Monte-Carlo methods to evaluate p-values for those tests.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2005, 25, 2; 241-249
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Cross additivity - an application
Autorzy:: Ferreira, Sandra
Ferreira, Dário
Mexia, João
Powiązania:: https://bibliotekanauki.pl/articles/730004.pdf
Data publikacji:: 2006
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: cross nested designs
cross additivity
variance components
UMVUE
Opis:: We try to show that Discriminant Analysis can be considered as a branch of Statistical Decision Theory when viewed from a Bayesian approach. First we present the necessary measure theory results, next we briefly outline the foundations of Bayesian Inference before developing Discriminant Analysis as an application of Bayesian Estimation. Our approach renders Discriminant Analysis more flexible since it gives the possibility of classing an element as belonging to a group of populations. This possibility arises from the introduction of the concept of regions of controled posterior risk.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2006, 26, 2; 207-219
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Generalized F tests in models with random perturbations: the gamma case
Autorzy:: Pinto Nunes, Célia
Bargão Saraiva Ferreira, Sandra
da Conceição Ferreira, Dário
Powiązania:: https://bibliotekanauki.pl/articles/729976.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: generalized F distributions
random non-centrality parameters
Gamma distribution
Opis:: Generalized F tests were introduced for linear models by Michalski and Zmyślony (1996, 1999). When the observations are taken in not perfectly standardized conditions the F tests have generalized F distributions with random non-centrality parameters, see Nunes and Mexia (2006). We now study the case of nearly normal perturbations leading to Gamma distributed non-centrality parameters.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2009, 29, 2; 185-197
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

Artykuł

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