Gaussian Mean Testing Made Simple

Gaussian Mean Testing Made Simple
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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:
ArXiv
影响因子:
--
通讯作者:
Ankit Pensia
Ankit Pensia
中科院分区:
--
文献类型:
--
作者:
Ilias Diakonikolas;D. Kane;Ankit Pensia

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我们研究以下基本假设检验问题,我们将其称为高斯平均测试。给定I.I.D. $ \ mathbb {r}^d $上的分布$ p $的样本是在以下情况下以很高的概率区分:(i)$ p $是标准高斯分布,$ \ nathcal {n }(0,i_d)$,(ii)$ p $是高斯$ \ mathcal {n}(\ mu,\ sigma)$协方差$ \ sigma $ and Mean $ \ mu \ in \ mathbb {r}^d $满足$ \ | \ | \ mu \ | _2 \ geq \ epsilon $。最近的工作给出了此测试问题的算法,其最佳样本复杂性为$ \ theta(\ sqrt {d}/\ epsilon^2)$。以前的算法及其分析都非常复杂。在这里,我们通过一页分析给出了一种极其简单的高斯平均测试算法。我们的算法是最佳样品,并在样本线性时间内运行。
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.
高概率的样本最优身份测试
DOI: --
发表时间: 2018
期刊: and Automata
影响因子: --
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