I'm looking for some kind of function I can compute on a bunch of numbers. The idea is that if I increase all numbers by some coefficient (say 2) the value of this should not change.
Edit: I know I can just divide all the numbers by the largest and then compute any other statistic. I'm more looking for some function that doesn't care about the actual numbers but the relative differences betwen them.
The problem with just dividing everything by the largest is that it would make this extremely sensitive to outliers or bad data