1. Department of Mathematics , University of Maine , Orono, Maine, 04469;2. Biomathematics Modeling Branch. USAF School of Aerospace Xedicine , Brooks Air Force Base, Texas, 78235
Abstract:
A proof is provided to show that Gehan's 1965 generalization of the two sample Wilcoxon test lies outside the class of efficient score procedures for right censored data (Prentice 1978).