(1 point) Test the claim that the two samples described below come from populations with the same mean. Assume that the samples are independent simple random samples. Use a signifcance level of a = 0.05 Sample 1: n1 = 14, X1 = 22.9, $1 = 6.4 Sample 2: n2 = 7, X2 = 28.7, $2 = 6 (a) The degree of freedom is (b) The test statistic is (c) Determine the rejection region for the test of Ho : (M1 - /2) = 0 and Ha : (M1 - 12) # 0 t > The final conclustion is O A. We can reject the null hypothesis that (1 - /2) = 0 and accept that (/1 - /2) / 0. O B. There is not sufficient evidence to reject the null hypothesis that (/1 - /2) = 0