Robust hypothesis testing and distribution estimation in Hellinger distance

11/03/2020

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by   Ananda Theertha Suresh, et al.

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We propose a simple robust hypothesis test that has the same sample complexity as that of the optimal Neyman-Pearson test up to constants, but robust to distribution perturbations under Hellinger distance. We discuss the applicability of such a robust test for estimating distributions in Hellinger distance. We empirically demonstrate the power of the test on canonical distributions.