For Exercises 1 and 2, answer the following questions:

  1. Calculate .
  2. Find for a confidence interval for with 95% confidence.
  3. Compute and interpret , the margin of error for a confidence interval with 95% confidence.
  4. Construct and interpret a 95% confidence interval for .

Question 8.303

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