Stats Collection on table that is being used by PI column only

Database
Teradata Employee

Stats Collection on table that is being used by PI column only

Hi ,

If a table is being accessed only by PI then do we we still require stats collection on the table.

other question : if table is well distributed do we still need to collect stats on table. this is being accssed by any colomn. In this, Does Random Amp sampling help to provide information that stats does.