A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2

2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim?

Let d=(bloodpressurebeforetakingnewdrug)(bloodpressureaftertakingnewdrug)

d=(bloodpressurebeforetakingnewdrug)(bloodpressureaftertakingnewdrug). Use a significance level of =0.01

=0.01 for the test. Assume that the systolic blood pressure levels are normally distributed for the population of patients both before and after taking the new drug.

Patient123456789Blood pressure (before)203

203156

156195

195191

191171

171148

148193

193186

186182

182Blood pressure (after)195

195145

145175

175185

185164

164141

141183

183180

180157

157

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Step1of5:State the null and alternative hypotheses for the test.