For Exercises 17–20 a confidence interval for is given. Use the confidence interval to test, at level of significance , whether differs from each of the designated hypothesized values.

Question 10.68

17. A 95% confidence interval for is (10, 15). Hypothesized values are

  1. 0
  2. 12
  3. 16

10.2.17

(a) lies outside of the interval (10, 15), so we reject at the level of significance. (b) . lies inside of the interval (10, 15), so we do not reject at the level of significance. (c) . lies outside of the interval (10, 15), so we reject at the level of significance.