formula (array or otherwise) to average data in one column in different size blocks

Interesting results:

=AVERAGE(N4:N8) 60.32

=AVERAGE(OFFSET($N$1,3,0,5)) 60.32

=OFFSET($N$1,MATCH(A1&"",$N$1:$N$200,0)+1, 0,5) 60.69

=OFFSET($N$1,MATCH(A1&"",$N$1:$N$200,0), 0,5) 60.69

Jason's formula: 59.87


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