Reducing a model to only one-two terms
Hello all, I'm currently analyzing a 4 factor half-factorial design. My pareto chart is indicating that only one-two main effects for given responses are significant. Would it be acceptable to remove the remaining insignificant main effect and interaction terms from the model? I've trialed this, by reducing the model as described above. The R2 and Adjusted R2 are close (0.68 vs 0.63), so not fanta...