title: Nonparametric procedures for comparing umbrella pattern treatment effects with a control in a one-way layout.
abstract: In this paper we are concerned with comparing umbrella pattern treatment effects with a control in a one-way layout. The problem of testing whether there is at least one treatment that is better than the control is considered. Distribution-free tests are proposed for both cases where the peak of the umbrella is known or unknown. Approximate small-sample critical values are presented and the results of a Monte Carlo power study are discussed.
authors.affiliation: Graduate Institute of Statistics, National Central University, Taiwan, Republic of China.
authors.forename: Y I
authors.initials: YI
authors.lastname: Chen
authors.forename: D A
authors.initials: DA
authors.lastname: Wolfe
mesh_terms: D004358:Drug Therapy / Q000379:methods*; D006801:Humans; D008433:Mathematics; D015233:Models, Statistical; D009010:Monte Carlo Method; D009152:Mutagenicity Tests / Q000379:methods; D010600:Pharmacology / Q000379:methods*