Hi Lucas,
No you can't "reset" statistics.
You can "UPDATE" statistics such as:
UPDATE SYSSTAT.TABLES
SET CARD = -1
NPAGES = -1
FPAGES = -1
OVERFLOW = -1
WHERE TABSCHEMA = 'xxx'
AND TABNAME = 'yyy'
If you have DB2 for Win-Unix installed on a PC, go to the HELP -> INFORMATION Center to access almost all of DB2 for Win-Unix reference materials.
Larry Kintisch
IBM Contractor Instructor for DB2, SQl, QMF, Data modeling; [DB2 for z/OS]