Vlad Savov @vladsavov
Fun stats fact: by the time you get a few hundred responses on a poll from a fairly representative group, you have enough to tell you about the whole group. Ratio of responses at 500 is often the same as at 15,000, albeit the latter comes with a much higher degree of confidence. — PolitiTweet.org
Vlad Savov @vladsavov
iPhone users, how do you read your Gmails?
