I'm trying to calculate the likliehood that a website post will be 'useful' to people.
Website post 1 is voted to be useful by 8 people and 'not useful' by 2 people.
Website post 2 is voted to be useful by 800 people and 'not useful' by 200 people.
So on the face of it both posts are 80% likely to be useful to the next website viewer. However, because post 2 has been voted on by far more people I think it is more likely to be useful because it is less likely to have been a 'fluke' result. My question is how do I quantify how likley each post is to be be useful for the next website viewer, whilst taking into account the sample size of the votes???
Thanks for your help!