What are the average Elo and USCF ratings? - Chess Stack Exchange

I'm not sure if there exists an average, but what could be considered an average rating range in these systems?

statistics - How do age and initial rating correlate to decline in playing strength with age? - Chess Stack Exchange

rating - What do you call average? - Chess Stack Exchange

Improved Chess Rating Comparisons Using Nonparametric Statistics

Elo rating system - Wikipedia

Build Up Your Chess 1: The Fundamentals (Yusupov's Chess School): Yusupov, Artur: 9781906552015: : Books

How to improve my chess skill - Quora

What is considered an average chess rating? - Quora

Win with Dutch Defense - GM Miloje Ratkovic

statistics - Distribution of Elo ratings - Chess Stack Exchange

Current average chess rating - Chess Forums