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 8.33

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

8.1.33

(a) 0.1 (b) 1.96 (c) (−5.196, −4.804). We are 95% confident that the population mean lies between 25.196 and 24.804.