Expanding an existing Custom Design, with additional categorical factors
Hello, I recently performed a custom design with 7x continuous and 1x 2-level categorical factors. Everything went well, and we moved forward with the suggested output.We're revisiting this work and now need to expand by adding 2 additional catageorical factors into the design and i'm struggling to think of the best way to do it to make the most of the existing data. Fold overs or space filling de...