• Review the following data where patients with high blood pressure are given a drug that is thought to lower their blood pressure. The "before" amounts represent their blood pressure before taking the medicine. The "after" amounts represent their blood pressure after taking the medicine for three months:

Subject	Before	After
1	140	140
2	148	140
3	146	138
4	154	152
5	142	144
6	151	148
7	140	138
8	148	146
9	146	148
10	154	150
11	142	140
12	151	148
13	153	150

A) State why a sign test for matched pairs would be appropriate for this example.

B) Set up the hypotheses to determine if the claim is that the medicine helps to reduce blood pressure.

C) Calculate the test statistic and p-value for this example.

D) What would your conclusion be at the 0.05 level of significance?