Given the following null and alternative hypotheses H0: m1  m2  0 HA: m1  m2  0 and the following sample information Sample 1 Sample 2 n1  125 n2  120 s1  31 s2  38 –x 1  130 –x 2  105

a. Develop the appropriate decision rule, assuming a significance level of 0.05 is to be used.

b. Test the null hypothesis and indicate whether the sample information leads you to reject or fail to reject the null hypothesis. Use the test statistic approach.