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.
9. Confidence level 95%, , ,
8.2.9
The sample size is not large ( is not ) and we are not told that the population is normal. Therefore, the conditions are not met for the interval for μ. It is not okay to construct the interval.