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.
27. A 95% confidence interval for is (–5, 5).
Hypothesized values are
10.1.27
(a) . lies inside of the interval (–5, 5), so we do not reject at the level of significance. (b) . lies outside of the interval (–5, 5), so we reject at the level of significance. (c) . lies inside of the interval (–5, 5), so we do not reject at the level of significance.