What is a confidence interval, and how do you interpret it correctly?
~4 min by voice
How to approach it
The interviewer wants to see whether you understand a confidence interval as an estimate of a population parameter from a sample, whether you can interpret it correctly (through repeated experiments, not as "a 95% probability the parameter is inside"), and whether you know what its width depends on.
The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.