Whew! It's very hard to get details from you about what you are doing. I'm still not sure if you've shown me the part that you're having trouble with, because I don't see any code for finding the averages.

However, I noticed a strange line here:

push (my @visual_page_values, {$processed_visual_pages{$dateproc}});
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That "my" is scoped inside an if block and it won't be visible elsewhere. Also, for some reason you're creating a hash reference that has only one element, not a key/value pair.

I notice at the start of your program that you commented out "use strict;" That's a very bad idea. I doubt you will be able to untangle the uses of "my" and global variables until you turn strict back on.