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 significance level of $\alpha = 0.1$

Sample 1: $n_1 = 6, \ \overline{x}_1 = 21.8, \ s_1 = 9.68$
Sample 2: $n_2 = 13, \ \overline{x}_2 = 27.9, \ s_2 = 6.74$

(a) The degree of freedom is

(b) The test statistic is

(c) The final conclusion is

A. We can reject the null hypothesis that $(\mu_1 - \mu_2) = 0$ and accept that $(\mu_1 - \mu_2) \ne 0$.
B. There is not sufficient evidence to reject the null hypothesis that $(\mu_1 - \mu_2) = 0$.