Local significant differences from nonparametric two-sample tests

Tarn Duong

Journal of Nonparametric Statistics, 2013, vol. 25, issue 3, 635-645

Abstract: We establish a framework to investigate the local differences of two multivariate data samples, as measured by a statistically significant two-sample test. This framework identifies the locally significant difference regions by computing local test statistics based on the squared difference of two kernel density estimators. The key differences between the data samples are concentrated in these significantly different regions. We illustrate the visualisation and interpretation of local significant differences for simulated data, and their potential in the role of biomarker discovery for biological/biomedical data.

Date: 2013
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DOI: 10.1080/10485252.2013.810217

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