Assume that both populations are normally, distributed. Sample 1 Sample 2 a) Test whether Hy > 12 at the a = 0.05 level of significance for the given sample data n 27 20 2 b) Construct a 95% confidence interval about 1 - H2 X 52.7 42 8 S 53 12 Click the icon to view the Student t-distribution table. 28 OD. HO H1 = 12, H1 141