Can we find average of the time stamp and display in widget?

Hi Community, I'm uploading Historic data...in which I've a Embedded field named as "Waiting_time" which records the time a customer was waiting until s/he was served by a customer care representative. The time is stored in the below format... 0:12:56 0:00:22 0:04:28 0:01:30 0:32:52 0:00:10 0:07:46 0:03:08 1:04:58 What should be the Field Type of this Embedded data field so that I can calculate the average wait time? Thanks, Abdul