Results 11 to 20 of about 13,427,618 (297)
Wald type tests with the wrong dispersion matrix
Communications in Statistics - Theory and Methods, 2022 A Wald type test with the wrong dispersion matrix is used when the dispersion matrix is not a consistent estimator of the asymptotic covariance matrix of the test statistic.
Kosman W. G. D. H. Rajapaksha +1 more
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Journal of Computational and Applied Mathematics, 2021 In this paper we propose a new family of estimators, Minimum Density Power Divergence Estimators (MDPDE), as a robust generalization of maximum likelihood estimators (MLE) for the loglinear model with multinomial sampling by using the Density Power Divergence (DPD) measure introduced by Basu et al. (1998).
Aida Calviño +2 more
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A New Class of Robust Two-Sample Wald-Type Tests [PDF]
The International Journal of Biostatistics, 2018 Abstract Parametric hypothesis testing associated with two independent samples arises frequently in several applications in biology, medical sciences, epidemiology, reliability and many more. In this paper, we propose robust Wald-type tests for testing such two sample problems using the minimum density power divergence estimators of ...
Ghosh, Abhik +3 more
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Wald type and phi-divergence based test-statistics for isotonic binomial proportions [PDF]
Mathematics and Computers in Simulation, 2016 In this paper new test statistics are introduced and studied for the important problem of testing hypothesis that involves inequality constraint on proportions when the sample comes from independent binomial random variables: Wald type and phi-divergence based test-statistics.
Nirian Martín +2 more
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Robust Wald-type tests based on minimum Rényi pseudodistance estimators for the multiple linear regression model [PDF]
Journal of Statistical Computation and Simulation, 2020 We introduce a new family of Wald-type tests, based on minimum Rényi pseudodistance estimators, for testing general linear hypotheses and the variance of the residuals in the multiple regression model. The classical Wald test, based on the maximum likelihood estimator, can be seen as a particular case inside our family.
E. Castilla +3 more
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Simple Wald tests of the fractional integration parameter : an overview of new results [PDF]
, 2008 This paper presents an overview of some new results regarding an easily implementable Wald test-statistic (EFDF test) of the null hypotheses that a time-series process is I(1) or I(0) against fractional I(d) alternatives, with d∈(0,1), allowing for ...
Gonzalo, Jesús +2 more
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On testing proportional odds assumptions for proportional odds models
General Psychiatry, 2023 Proportional odds models are commonly used to model ordinal responses, but the proportional odds assumption may not hold in practice, leading to biased inference.
Xin M Tu, Hua He, Anqi Liu, Wan Tang
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Wald-Type Testing and Estimation Methods for Asymmetric Comparisons of Poisson Rates [PDF]
Statistics in Biopharmaceutical Research, 2015 This article considers the problem of asymmetric comparisons, that is, instances where one treatment serves as the compelling standard treatment for a certain disease or health condition, where the asymmetric comparisons are performed in terms of the Poisson rates.
C. Bright, Brianna, N. Soulakova, Julia
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Wald Tests of I(1) against I(d) alternatives : some new properties and an extension to processes with trending components [PDF]
, 2007 Forthcoming 2008This paper analyses the behaviour of a Wald-type test, i.e., the (E¢ cient) Fractional Dickey-Fuller (EFDF) test of I(1) against I(d); d < 1; relative to LM tests. Further, it extends the implementation of the EFDF test to the presence of
Gonzalo, Jesús +3 more
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Influence analysis of robust Wald-type tests
Journal of Multivariate Analysis, 2016 36 ...
Abhik Ghosh +3 more
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