For Exercises 27–34, answer the following questions:

  1. Calculate .
  2. Find for a confidence interval for with 95% confidence.
  3. Construct and interpret a 95% confidence interval for .

Question 8.29

29. A random sample of with sample mean is drawn from a normal population in which .

8.1.29

(a) 2.6667 (b) 1.96 (c) (14.7733, 25.2267). We are 95% confident that the population mean lies between 14.7733 and 25.2267.