For Exercises 17–22, we are taking a random sample from a normal population with unknown.

  1. Find .
  2. Confirm that the requirements are met for the confidence interval for .
  3. Construct the confidence interval for with the indicated confidence level.
  4. Sketch the confidence interval on a number line.

Question 8.115

18. Confidence level 95%, sample size 16, sample mean 22, sample standard deviation 3