For Exercises 27–30 a confidence interval for is given. Use the confidence interval to test, using level of significance , whether differs from each of the indicated hypothesized values.

Question 10.29

29. A 90% confidence interval for is (10, 20).

Hypothesized values are

  1. −10
  2. 25
  3. 0

10.1.29

(a) . lies outside of the interval (10, 20), so we reject at the level of significance. (b) . lies outside of the interval (10, 20), so we reject at the level of snificance. (c) . lies outside of the interval (10, 20), so we reject at the level of significance.