Many-to-one Comparisons in Stratified Designs

摘要

Cheung and Holland (1992) extended Dunnett's procedure for comparing all active treatments with a control simultaneously within each of r groups while maintaining the Type I error rate at some designated level a allowing different sample sizes for each of the group-treatment categories. This paper shows that exact percentage points can be easily calculated with current available statistical software (SAS). This procedure is compared to resampling techniques and a Bonferroni corrected Dunnett-with-in-group procedure by means of a simulation study.