Hi Rachit,
Just some information, DB6 V9.7 FP6 and onwards, it is recommended to use autorunstats.
1291866 - DB6: Default settings to generate statistics
The default procedure for the automatic update of table statistics is DB2 AUTORUNSTATS. You should use DB2 AUTORUNSTATS instead of SAP Runstats.
On 7.30 autorunstats should be used and their is no need for a job in DB13. Indeed, all releases as of Release 7.0.
Regards,
Hugo