1. Are there differences between smokers and nonsmokers in systolic blood pressure? > This is two independent samples, continuous outcomes Step 1: Hypothesis Null hypothesis: There are no differences between smokers and nonsmokers in systolic blood pressure. Alternate hypothesis: There are differences between smokers and nonsmokers in systolic blood pressure. H01 \"-1 = \"-2 H11 \"-1 u2 a=0.05 Step 2: Test statistic n1: smokers with systolic blood pressure n2: nonsmokers with systolic blood pressure n1 and n2> 30, we use 2 test statistic Test statistic: 21-312 n1 2 3 and _ l 1 no; 30 SP. +