Normal Q-Q plots - what is the robust line and should we prefer it?
Warning - This is a long, exploratory post on Q-Q plots motivated by the specific data set analyzed below and the code follows my stream of thinking this through. I have not gone back through to economize length. So yeh, some repeated code I’ve turned into functions and other repeated code is repeated.
This post is not about how to interpret a Q-Q plot but about which Q-Q plot? to interpret.