Confidence Sets and Hypothesis Testing in a …
Confidence Sets and Hypothesis Testing in a Likelihood-Free Inference Setting
Nic Dalmasso1, Rafael Izbicki2, Ann B. Lee1
1 Department of Statistics & Data Science, Carnegie Mellon University 2 Department of Statistics, Federal University of Sao Carl~os
International Conference on Machine Learning (ICML) July 12-18 2020
Nic Dalmasso (Carnegie Mellon University)
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Motivation: Likelihood in Studying Complex Phenomena
However, for some complex phenomena in the science and engineering, an explicit likelihood function might not be available.
Nic Dalmasso (Carnegie Mellon University)
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Likelihood-Free Inference
1 True likelihood cannot be evaluated 2 Samples can be generated for fixed settings of , so the likelihood is
implicitly defined
Inference on parameters in this setting is known as likelihood-free inference (LFI).
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Likelihood-Free Inference Literature
Approximate Bayesian computation1 More recent developments:
Direct posterior estimation (bypassing the likelihood)2 Likelihood estimation3 Likelihood ratio estimation4
Hypothesis testing and confidence sets can be considered cornerstones of classical statistics, but have not received much attention in LFI.
1Beaumont et al. 2002, Marin et al. 2012, Sisson et al. 2018 2Marin et al., 2016; Izbicki et al., 2019; Greenberg et al., 2019 3Thomas et al., 2016; Price et al., 2018; Ong et al., 2018; Lueckmann et al., 2019;
Papamakarios et al., 2019 4Izbicki et al., 2014; Cranmer et al., 2015; Frate et al., 2016
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A Frequentist Approach to LFI
Our goal is to develop: 1 valid hypothesis testing procedures 2 confidence intervals with the correct coverage
Main Challenges: Dealing with high-dimensional and different types of simulated data Computational efficiency Assessing validity and coverage
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