I have a spreadsheet of 70k businesses. I got a team to validate these businesses for name, address, phone number accuracy, whether the business is open or closed etc. I want a team to test and spot check their work to make sure the data is good. I understand spotchecking 70k data quickly is difficult. So any test / review method that gives indication / random tests should be good enough.
Need to randomly call these businesses in USA to check.