1.000 people attempted a task and 30 succeeded. Given this information, we can say that the success rate was 3%.
But what if I want to estimate from this sample a confidence interval for the success rate in the population? For example, given that previous data, the success rate is between let's say 1% and 5% in 95% of cases.
How can I calculate that interval with a 95% certainty? is there any tool online?
Thank you, Luca