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Rank tests for regression and k-sample rank tests under random censorship

Affiliation:	1. Neuroscience Research Department, Centre for Addiction and Mental Health, 33 Russell Street, Toronto, Ontario M5S 2S1, Canada;2. Research Imaging Centre, Centre for Addiction and Mental Health, 250 College Street, Toronto, Ontario M5T 1R8, Canada;1. Department of Radiation Oncology, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany;2. Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany;3. Department of Molecular and Radiation Oncology, German Cancer Research Center (dkfz), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany

Abstract:	The uncensored observations and the censored ones are ranked separately. A test statistic is obtained by suitably combining the rank statistics corresponding to these two groups. This approach leads to simple tests that closely resemble those for the uncensored situation.

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