Tweeted By @NateSilver538

2. Say you have a sample size of 5,000 cases, and of those cases, a dozen or so are missing or look as though they're miscoded. You might think, "That's not bad. I'll just throw those cases out and I'll be fine". And you probably will be fine if that's all there is to it.

— Nate Silver (@NateSilver538) July 18, 2018