Joe Newbie completed a test to inspect a sample of sales invoices to verify that the goods were shipped, and to match the shipping date with the date per the sales invoice. Joe identified the population from which to sample as the listing of all shipments made by Fishy for aquarium orders. Fishy has a computerized list of shipments that can be used to select the appropriate sample.

The sampling methodology used by Newbie is.......

Correct or Incorrect? (choose either correct or incorrect only)