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 8.114

17. Confidence level 90%, sample size 16, sample mean 10, sample standard deviation 5

8.2.17

(a) (b) We are told that the population is normal. (c) (7.8, 12.2); We are 90% confident that the population mean lies between 7.8 and 12.2.

(d)

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