timing in execution plan

| Id  | Operation                          | Name                 | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |

-------------------------------------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT                   |                      |  5346K|   249M|       |  6096K  (1)| 00:01:03 |

|   1 |  HASH GROUP BY                     |                      |  5346K|   249M|   288M|  6096K  (1)| 00:01:03 |

Hi,

I find the timing in execution plan does not match in reality, AWRSQRPT also shows different time for per execution.

i) is the timing in HH:MM:SS?

ii) is the timing in awrsqrpt too  in same format HH:MM:SS?

iii) why awrsqrpt and dbms_xplan outputs different?.. which one is accurate and which one estimation?.. I found  none of them are matching timing with real-time monitoring