How to Calculate Exact Confidence Intervals

There's an intuitive trade-off here. The more precise you need the answer to be, the less confident you can be. Linda: I believe if I did not follow up with people, like 80% of those requests would not get answered. But how many times do you answer someone that you've never met before? We're going to invite 30 of our friends. If it was random, I would have said zero.