Robust Asymptotic Tests of Statistical Hypotheses Involving Nuisance Parameters

Abstract

A robust version of Neyman's optimal $C(\alpha)$ test is proposed for contamination neighborhoods. The proposed robust test is shown to be asymptotically locally maximin among all asymptotic level $\alpha$ tests. Asymptotic efficiency of the test procedure at the ideal model is investigated. An outlier resistant version of Student's $t$-test is proposed.