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A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...

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 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d=(blood pressure before taking new drug)?(blood pressure after taking new drug) . Use a significance level of ?=0.05 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. Patient 1 2 3 4 5 6 7 8 9 Blood pressure (before) 182 164 176 171 197 168 176 177 187 Blood pressure (after) 175 151 153 159 179 143 160 161 162 Step 1 of 5 : State the null and alternative hypotheses for the test.

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Differences (Blood pressure (before) - Blood pressure (after) 7, 13, 23, 12, 18, 25, 16, 16, 25 We calculate sample mean andUsing excel we find exact p valueP(t > 8.333) t.dist(-8.333, 8, 1)- 0.0000162627 taritical ta d to 05,df-8 1.860 (from t-tabl

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