Assuming that n1 = n,, find the sample sizes nceded to estimate (p, - p2) for each of the following situations:

a. Bound = .O1 with 99% confidence. Assume that p, = .4 and p, = .7.

b. A 90% confidence interval of width .05. Assume there is no prior information available to obtain approximate values of p1 and p, .

C. Bound = .03 with 90% confidence. Assume that p, = .2 and p, = .3.

Applying the Concepts