For each of Exercises 9–12, we are taking a random sample from a population with unknown. Check whether the conditions are met for constructing the indicated interval for . If not, explain why not.
11. Confidence level 95%, , ,
8.2.11
We are not told that the population is normal. However, the sample size is large ( is ). Therefore, the conditions are met for the interval for μ. It is okay to construct the interval.