Find the test statistic . Find the standardize test statistic. decide whether the standardize test statist is in the rejection region and decide whether you should reject or fail to reject the null. Sample are random and independent. Claim u1 =u2, a = 0.05, sample statistic x1, =15, s1 = 1.1 n=40 and x2 =12, s2 = 1.5, n=50.