To validate a model, can I compare the optimal conditions with that of the same model with 6 new runs added?
Here are the optimal conditions for the model comprised of 15 Box Behnken design runs with standard least squares. The optimal conditions for the model comprised of the same 15 Box Behnken design runs + 6 new runs, yield nearly the same optimal conditions with a slightly lower defect rate to fall within the spec limits. Could it be statistically justifiable to compare the optimal conditions of ...