Answer Happy

When subjects were treated with a drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken. Results are given in the table below. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Using a 0.05 significance level, is there sufficient evidence to support the claim that the drug is effective in lowering systolic blood pressure? Before After 188 179 179 147 155 173 184 175 158 159 157 152 159 163 183 144 195 176 155 156 210 179 164 148 In this example, He is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the systolic blood pressure reading before the drug was taken minus the reading after the drug was taken. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: Md+ 0 H:Hd > 0 OC. Ho: Ha#0 H:Hd = 0 OB. Ho: Md = 0 H:Hd <0 D. Ho: Hd = 0 H:Hd > 0 Identify the test statistic. t= (Round to two decimal places as needed.)