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 8.116

19. Confidence level 99%, , ,

8.2.19

(a) (b) We are told that the population is normal. (c) (43.3, 56.7). We are 99% confident that the population mean lies between 43.3 and 56.7.

(d)

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