I have to write an essay at the moment and unfortunately I am stuck on a question, maybe you can help me with it.

The question is as follows: "Describe in your own words how an approximation method that determines a confidence interval for the mean of a population from a sample can be derived from the urn model. Also state a necessary requirement."

Unfortunately, I can't find any literature for this question. I believe this question is not too complicated, but unfortunately I am a little bit lost.

Maybe you guys can help me out!

Thanks and many greetings

Sam