Data were collected on the annual mortality rate (deaths per 100,000) for males in 61 large towns in England and Wales. The data set also notes for each town whether it was south or north of Derby. The summary statistics are given below. Is there a significant difference in mortality rates in the two regions? Answer parts a and b. Assume a significance level of a = 0.05. Group Count Mean Median StdDev North 36 1655.96 1655 120.11 South 25 1535.24 1519 151.92 Click the icon to view the boxplot of the data. a) Test the null hypothesis at a = 0.05 using the two-sample t-test. Identify the null and alternative hypotheses. Choose the correct answer below. OA. HO: HN - HS #0 O B. HO: HN - HS =0 HA : HN - HS =0 HA: HN - HS >0 O C. HO: HN - HS =0 OD. HO: HN - HS =0 HA: HN - HS #0 HA: HN - HS