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Learning Optimal Test Statistics in the Presence of Nuisance Parameters

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arxiv 2203.13079 v1 pith:3L2OCYJL submitted 2022-03-24 stat.ME physics.data-an

classification stat.MEphysics.data-an
keywords statisticstestoptimalcasesknownlikelihoodlikelihood-freeprofile
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The design of optimal test statistics is a key task in frequentist statistics and for a number of scenarios optimal test statistics such as the profile-likelihood ratio are known. By turning this argument around we can find the profile likelihood ratio even in likelihood-free cases, where only samples from a simulator are available, by optimizing a test statistic within those scenarios. We propose a likelihood-free training algorithm that produces test statistics that are equivalent to the profile likelihood ratios in cases where the latter is known to be optimal.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On Focusing Statistical Power for Searches and Measurements in Particle Physics

    hep-ph 2025-07 conditional novelty 5.0 of 10

    A focused test statistic that weights alternative hypotheses by a user-chosen focus function yields valid frequentist confidence intervals with shorter expected length than the likelihood-ratio test in regions of inte...

  2. Communicating Likelihoods with Normalising Flows

    hep-ph 2025-02 conditional novelty 4.0 of 10

    A normalizing-flow workflow compresses sample-based likelihoods into small files, validated with a radial Kolmogorov-Smirnov test on three high-energy physics examples.

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