Let's pretend I'm conducting a poll/survey. It's a simple yes/no poll (i.e. everyone only gives 1 of 2 answers). I have asked N people so far, and X of them have said "yes".
I would like to stop asking people (i.e. stop the poll) when I can be sure to some high level of statistical confidence (e.g. 95% sure) that I have something that's accurate.
Does this question even make sense?
This is not a proper stats problem, i.e. "good enough" answers are alright. I don't need a high level of mathematical rigour. Right now I have nothing and I would like something that would at least point me down the path of knowledge. What would I need to do/know/compute/provide to you to figure out what's going on?