9.

a. Under the same conditions as those leading to the interval (8.5),

. Use this to derive a one-sided interval for m that has in nite width and provides a lower con dence bound on m. What is this interval for the data in Exercise 5(a)?

b. Generalize the result of part

(a) to obtain a lower bound with con dence level 100(1  a)%.

c. What is an analogous interval to that of part (b)

that provides an upper bound on m? Compute this 99% interval for the data of Exercise 4(a).