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Efficient median of means estimator
Proceedings of Thirty Sixth Conference on Learning Theory, PMLR 195:5925-5933, 2023.
Abstract
The goal of this note is to present a modification of the popular median of means estimator that achieves sub-Gaussian deviation bounds with nearly optimal constants under minimal assumptions on the underlying distribution. We build on a recent work on the topic and prove that desired guarantees can be attained under weaker requirements.