DOE custom design with covariates
Hi community, I'm seeking to gain knowledge on what factors influence the force required to push on an inhalator mouthpiece to an inhalator.I have 8 boxes (A through H), each containing 1 inhalator and 12 mouth pieces (A1 to A12, B1 to B12, and so on). There are 3 types of inhalators across these 8 boxes (3 brown + 3 green + 2 red), but all the 96 mouthpieces are supposed to be identical.It is unk...