Gaussian Mean Testing Made Simple
Gaussian Mean Testing Made Simple
复制标题
高斯均值测试变得简单
DOI:
10.48550/arxiv.2210.13706
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Ankit Pensia
中科院分区:
文献类型:
--
作者:
Ilias Diakonikolas;D. Kane;Ankit Pensia
We study the following fundamental hypothesis testing problem, which we term Gaussian mean testing. Given i.i.d. samples from a distribution $p$ on $\mathbb{R}^d$, the task is to distinguish, with high probability, between the following cases: (i) $p$ is the standard Gaussian distribution, $\mathcal{N}(0,I_d)$, and (ii) $p$ is a Gaussian $\mathcal{N}(\mu,\Sigma)$ for some unknown covariance $\Sigma$ and mean $\mu \in \mathbb{R}^d$ satisfying $\|\mu\|_2 \geq \epsilon$. Recent work gave an algorithm for this testing problem with the optimal sample complexity of $\Theta(\sqrt{d}/\epsilon^2)$. Both the previous algorithm and its analysis are quite complicated. Here we give an extremely simple algorithm for Gaussian mean testing with a one-page analysis. Our algorithm is sample optimal and runs in sample linear time.
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影响因子:
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作者:
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通讯作者:
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