By Leah Dorazio Any teacher of introductory statistics has heard this question more times than they can remember: “Why 0.05?” Here, the value 0.05 refers to the significance level in a hypothesis test. A nice overview of hypothesis tests is described in the Fall/Winter 2015 issue of STN. In this article, I provide a brief review of the concepts of hypothesis test and … [Read more...] about Why 0.05? Two Examples That Put Students in the Role of Decision-Maker

