ok first I apologize, I know this must have been covered already somewhere.

Sheet1
A B C
1 TIME NUMBER AVERAGE
2 5:00 285.1 285.1
3 5:15 286.4
4 5:30 286.2
5 6:00 287.1 286.6
6 6:15 286.9

OK this is what I need, I have TIME (Actual data in per minute
5:00,5:01,5:02 etc) and NUMBER. What I need is to calculate the average for
each hour. So at 5:00, 6:00, 7:00 etc. I need to calculate the average for
4:00 to 4:59, 5:00 to 5:59, 6:00 to 6:59..etc.

I know this can be done with SUMPRODUCT but I just can't seem to get the
code to work for me. ANy help would be great, thanks!