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|a (JST)2674085
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|a Lopuhaa, Hendrik P.
|e verfasserin
|4 aut
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|a Asymptotics of Reweighted Estimators of Multivariate Location and Scatter
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|c 1999
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|a Text
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|a We investigate the asymptotic behavior of a weighted sample mean and covariance, where the weights are determined by the Mahalanobis distances with respect to initial robust estimators. We derive an explicit expansion for the weighted estimators. From this expansion it can be seen that reweighting does not improve the rate of convergence of the initial estimators. We also show that if one uses smooth S-estimators to determine the weights, the weighted estimators are asymptotically normal. Finally, we will compare the efficiency and local robustness of the reweighted S-estimators with two other improvements of S-estimators: τ-estimators and constrained M-estimators.
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|a Copyright 1999 Institute of Mathematical Statistics
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|a Robust Estimation of Multivariate Location and Covariance
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|a Reweighted Least Squares
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|a Application of Empirical Process Theory
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|a Mathematics
|x Applied mathematics
|x Statistics
|x Applied statistics
|x Inferential statistics
|x Statistical estimation
|x Estimation methods
|x Estimators
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4 |
|a Mathematics
|x Applied mathematics
|x Statistics
|x Applied statistics
|x Descriptive statistics
|x Measures of variability
|x Multivariate statistical analysis
|x Covariance
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|a Mathematics
|x Applied mathematics
|x Statistics
|x Applied statistics
|x Inferential statistics
|x Statistical estimation
|x Preliminary estimates
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4 |
|a Mathematics
|x Pure mathematics
|x Linear algebra
|x Vector analysis
|x Vector operations
|x Scalars
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650 |
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4 |
|a Mathematics
|x Pure mathematics
|x Linear algebra
|x Matrix theory
|x Matrices
|x Covariance matrices
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4 |
|a Behavioral sciences
|x Psychology
|x Cognitive psychology
|x Perception
|x Perceptual processing
|x Perceptual localization
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|a Mathematics
|x Mathematical values
|x Critical values
|x Extrema
|x Mathematical minima
|x Minimum value
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4 |
|a Mathematics
|x Applied mathematics
|x Statistics
|x Applied statistics
|x Descriptive statistics
|x Central tendencies
|x Sample mean
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650 |
|
4 |
|a Mathematics
|x Applied mathematics
|x Statistics
|x Applied statistics
|x Descriptive statistics
|x Statistical distributions
|x Distribution functions
|x Probability distributions
|x Gaussian distributions
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650 |
|
4 |
|a Mathematics
|x Applied mathematics
|x Statistics
|x Applied statistics
|x Statistical results
|x Statistical properties
|x Estimate reliability
|x Robust Estimation and Bootstrapping
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|a research-article
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|i Enthalten in
|t The Annals of Statistics
|d Institute of Mathematical Statistics
|g 27(1999), 5, Seite 1638-1665
|w (DE-627)270129162
|w (DE-600)1476670-X
|x 00905364
|7 nnns
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|g volume:27
|g year:1999
|g number:5
|g pages:1638-1665
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|u https://www.jstor.org/stable/2674085
|3 Volltext
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|d 27
|j 1999
|e 5
|h 1638-1665
|