Table schema:
CREATE TABLE table_name_20 (on_site_atms INTEGER, off_site_atms VARCHAR, total_atms VARCHAR)

Question: What is the mean on-site ATMS that have off-site ATMs of 1567, and the total number of ATMs less than 4772?
SQL: SELECT AVG(on_site_atms) FROM table_name_20 WHERE off_site_atms = 1567 AND total_atms < 4772