When should you only evaluate main effects? (Not main + 2nd Order Interaction)
Hi, I'd like to know when does a situation call for evaluation of only main effects, while ignoring interaction effects. Me and a colleague have different approaches to how screening designs are performed so I'd like to understand what others think. We can assume the following:This is a screening design (Let's say 4 factors - 2 Level)Nothing is known of the interactions up to this point and in the...