For Exercises 11–16, do the following for the designated data:

  1. Provide the point estimate of .
  2. Calculate the margin of error for the confidence level indicated.
  3. Construct and interpret a confidence interval for with the confidence level indicated.

Question 10.66

15. Data in Exercise 7, confidence level = 95%

10.2.15

(a) (b) . We can estimate the difference in the population means of Population 1 and Population 2 to within 0.811 with 95% confidence. (c) (–1.811, −0.189). We are 95% confident that the difference in the population means of Population 1 and Population 2 lies between 2 1.811 and 20.189.