Hello. I'm looking for a bit of help with breaking down phone call volume. How would I write the formula to see call volume by 15 min intervals? An example of the data is below.
Thank you very much!
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Start Date/Time Duration
7/1/2013 8:40 0:22:54
7/1/2013 8:41 0:04:18
7/1/2013 8:42 0:05:12
7/1/2013 8:42 0:14:06
7/1/2013 8:43 0:02:48
7/1/2013 8:44 0:11:48
7/1/2013 8:44 0:12:42
7/1/2013 8:44 0:04:36
7/1/2013 8:45 0:14:30
7/1/2013 8:45 0:02:18