Independent random samples, each containing 800 observations, were selected from two binomial populations. The samples from populations 1 and 2 produced 320 and 400 successes, respectively.
a. Test H0: (p1 - p2) = 0 against Ha: (p1 - p2) > 0. Use α = .05.
b. Test H0: (p1 - p2) = 0 against Ha: (p1 - p2) 0. Use α = .01.
c. Test H0,: (p1 - p2) = 0 against Ha: (p1 - p2) < 0. Use α = .01.
d. Form a 90% confidence interval for (p1 - p2).