Hi,
I just took a quick look in the docs and found the following procedures in DBMS_STATS....
CREATE_STAT_TABLE Procedure Creates a table with name stattab in ownname's schema which is capable of holding statistics.
EXPORT_COLUMN_STATS ProcedureRetrieves statistics for a particular column and stores them in the user stat table identified by stattab.
EXPORT_INDEX_STATS Procedure Retrieves statistics for a particular index and stores them in the user stat table identified by stattab.
EXPORT_TABLE_STATS Procedure
I couldn't post all of the relevant stuff here, but you can search the Oracle docs on oracle.com
The document I found this in is
Oracle8i Supplied PL/SQL Packages Reference
Release 2 (8.1.6)
Part Number A76936-01
It doesn't answer your question but hope it atleast points you in the right direction.
Regards
Bill