Difficulty of attaining USCF rating in different states. USCF is the chess federation for all of the United States. My question is if there is difference in a rating given in one state and another. For example, is a 1900 rated player in California on average better or worse than a 1900 in Indiana? I'd be interested in people's insights and/or data which draws you to your conclusion.
Ratings are not exactly "given", but determined from the outcome of games.

If 1) there is enough mixing (players from Indiana play against those from California, etc) and 2) if many games are played, the ratings should be comparable between states.

Conversely if a group of players is separated because they only play among themselves, this can lead to distortion of their ratings compared to players outside their group.