A goodness-of-fit test based on a recursive product of spacings. (1st March 2023)

• Record Type: Journal Article
• Authors: Eller, Philipp; Shtembari, Lolian
• Is Part Of: Journal of instrumentation. Volume 18:Number 3(2023)
• Publication Date: 2023-03-01
• Subjects: Analysis and statistical methods -- Data analysis -- Pattern recognition, cluster finding, calibration and fitting methods -- Trigger concepts and systems (hardware and software); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/18/03/P03048
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: We introduce a new statistical test based on the observed spacings of ordered data. The statistic is sensitive to detect non-uniformity in random samples, or short-lived features in event time series. Under some conditions, this new test can outperform existing ones, such as the well known Kolmogorov-Smirnov or Anderson-Darling tests, in particular when the number of samples is small and differences occur over a small quantile of the null hypothesis distribution. A detailed description of the test statistic is provided including a detailed discussion of the parameterization of its distribution via asymptotic bootstrapping as well as a novel per-quantile error estimation of the empirical cumulative distribution. Two example applications are provided, using the test to boost the sensitivity in generic "bump hunting", and employing the test to detect supernovae. The article is rounded off with an extended performance comparison to other, established goodness-of-fit tests.