Resumen
Consider the partially balanced one-way layout for comparing k treatments ?i,1?i?k, with a control ?0. We propose a new test which is similar to the test statistics of Marcus [1976. The powers of some tests of the equality of normal means against an ordered alternative. Biometrika 63, 177–183]. By simulation we find that the proposed test has a good power performance when compared with other tests. Moreover, it can produce confidence intervals for ?i-?0,1?i?k.