When the Underlying Distribution Being Sampled Is Normal, the T $\mu .$

Short Answer

When the underlying distribution being sampled is normal, the t test or the Wilcoxon signed-rank test can be used to test a hypothesis about the population mean $\mu .$ However, the __________ is the best test in such a situation because among all level $\alpha$ tests it is the one having minimum $\beta$ (i.e., minimum probability of Type II error)