“…Note that for this test a complete sample is needed, Itowever, there are many practical situations in which only an incomplete set of order statistics (s.o.s.) is observable (see, e.g., [2,3,5,8,9]). In this paper, the critical regions of the most powerful location and scale invariant tests based on incomplete s.o.s, are presented in the case of two-parameter distributions.…”