Question: A drug is used to lower blood pressure. A sample of eight patients were given the drug. Their blood pressure was taken before and after the drug. These are dependent samples. Test the claim, at the .05 level, that the drug lowers the pressure. State the hypotheses and identify the claim. find the critical value(s), compute the test value, make the decision and summarize the results.

Before After

135 124

120 118

155 148

137 128

115 112

187 172

173 161

160 151