Final answer:
Non-elite status customers who ticket Premium Economy are typically assigned to boarding group 5, as it is above Economy but below higher classes and elite statuses in boarding priority.
Step-by-step explanation:
When non-elite status customers purchase Premium Economy tickets on most airlines, they are typically assigned to boarding group 5. This is because most airlines have multiple boarding groups, with the earlier groups often reserved for First Class, Business Class, and elite-status frequent flyers. Premium Economy, being a step above Economy but below Business or First Class, is generally placed in the middle of the boarding process, which often corresponds with Group 5 or thereabouts. Boarding groups may vary by airline, so it's essential to check with the specific airline for their boarding policy.