a. Under the same conditions as those leading to the interval

(7.5), P[(X  )/(/n)  1.645]
.95. Use this to derive a one-sided interval for that has infinite width and provides a lower confidence bound on . What is this interval for the data in Exercise 5(a)?

b. Generalize the result of part

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

c. What is an analogous interval to that of part

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