The Case against normal plots of effects - Lenth, Russell V
When analyzing effects in an unreplicated environment, normal or half-normal plots of the effects (also called Daniel plots) are a popular way to visualize them and to judge which are active. This article discusses the ways in which these plots can be confusing and misleading. There are other methods available that are less subjective, easier to explain, more powerful, and less likely to be misinterpreted.
Keywords: Daniel plots; Normal plots; Unreplicated experiments