54 In each case, determine whether the sample sizes are large enough to conclude that the sampling distribution of 1pn 1 - pn 22 is approximately normal.

a. n1 = 10, n2 = 12, pn 1 = .50, pn 2 = .50

b. n1 = 10, n2 = 12, pn 1 = .10, pn 2 = .08

c. n1 = n2 = 30, pn 1 = .20, pn 2 = .30

d. n1 = 100, n2 = 200, pn 1 = .05, pn 2 = .09

e. n1 = 100, n2 = 200, pn 1 = .95, pn 2 = .91