Your question is Confidence Intervals From Data. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Explain how you would use a dataset to compute and interpret a confidence interval, including the underlying assumptions.
Describe the estimand, select an appropriate interval method, show the calculation, and explain how the confidence level affects interpretation. Address assumptions involving sampling, independence, distributional shape, sample size, and whether a normal or t-based method is appropriate.