Choose the appropriate hypothesis and decision rule at a = .05.

H0: π1 = π2 versus H1: π1 ≠ π2. Reject the null hypothesis if z < -1.96 or z > 1.96.

H0: π1 = π2 versus H1: π1 ≠ π2. Reject the null hypothesis if -1.96 < z < 1.96.

H0: π1 ≠ π2 versus H1: π1 = π2. Reject the null hypothesis if z < -1.96 or z > 1.96.

H0: π1 ≠ π2 versus H1: π1 = π2. Reject the null hypothesis if -1.96 < z < 1.96.

(b)

Calculate z

(c)

Can we reject the null hypothesis?

Yes

No