Hello, is there a record showing the partial regression analysis done on the arcing current data discussed in Annex G? Though purely an academic question, I am curious how 13th order polynomials, for example, made it into the standard's calculations via statistical analysis and would love to duplicate the process. In the way of background, I have made a VBA calculation tool for my work based on the new standard which lines up with sample calculations in Annex D, but I would not be able to answer the question above if it ever came up. Thank you.