Parallelism Testing for Groups of 4PL Curves
Hello All, I have what may be a very naïve question: is it valid to do parallelism testing on a group of independent curves (4PL in this case) at one time? I have a subset of potency data where all of the individual fits are good. p values for both both F test and Chi square well below 0.05...so the test is indicating non-parallelism. Now...what I am wondering, is this something that needs to be...