Side note: "The Wisdom of Crowds" by James Surowiecki

https://www.amazon.com/Wisdom-Crowds-James-Surowiecki/dp/038...

It isn't fool-proof, but there is a lot of research into the phenomenon that groups of humans are pretty good at predicting outcomes (much better than most individuals). I forget the math behind it, but it makes a lot of sense mathematically.

Here's a book all about it: http://www.amazon.com/The-Wisdom-Crowds-James-Surowiecki/dp/...

If you think you're going to harvest the "Wisdom of the Crowds", please go read James Surowiecki's book of the same name. http://www.amazon.com/The-Wisdom-Crowds-James-Surowiecki/dp/...

If that's too hard, at least understand the summary on Wikipedia: http://en.wikipedia.org/wiki/The_Wisdom_of_Crowds#Four_eleme...

A quick look at your site and it's clear you don't get point #2 Independence as you're showing people the prior avg before they submit their answer. I'll bet your site will suffer from a lack of #1 Diversity of opinion as well, as most websites tend to gather abnormally high concentrations of like minded people just through the natural ways they acquire and accrete audience.

Good luck with the app, I read the intro and the first thought that popped up was Wisdom of Crowds: http://www.amazon.com/The-Wisdom-Crowds-James-Surowiecki/dp/...