Adaptive confidence balls

T. Tony Cai; Mark G. Low

doi:10.1214/009053606000000146

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Home > Journals > Ann. Statist. > Volume 34 > Issue 1 > Article

February 2006 Adaptive confidence balls

T. Tony Cai, Mark G. Low

Ann. Statist. 34(1): 202-228 (February 2006). DOI: 10.1214/009053606000000146

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Abstract

Adaptive confidence balls are constructed for individual resolution levels as well as the entire mean vector in a multiresolution framework. Finite sample lower bounds are given for the minimum expected squared radius for confidence balls with a prespecified confidence level. The confidence balls are centered on adaptive estimators based on special local block thresholding rules. The radius is derived from an analysis of the loss of this adaptive estimator. In addition adaptive honest confidence balls are constructed which have guaranteed coverage probability over all of ℝ^N and expected squared radius adapting over a maximum range of Besov bodies.