what do you mean manipulate them?
If you need to view them look at the user_tabkes / user_indexes view
I need your help, I am new to the usage of statistics and I need to get the statistics for a specific schema. I know that by using the package DBMS_STATS.GATHER_SCHEMA_STATS I can the statistics, but I don't know how to manipulate them. Could you guys give me a clue about what should I do or where can I find information about using this packege and manipulating information given by it?