Question: 4. The following data give the cholesterol levels before and after the administration of a cholesterol-lowering drug in 10 randomly selected patients. Can we conclude

4. The following data give the cholesterol levels before and after the administration of a cholesterol-lowering drug in 10 randomly selected patients. Can we conclude at the 5% level of significance that the drug is ineffective?

Before: 183 174 145 140 177 153 175 173 140 152 After: 150 125 120 117 139 158 116 155 132 122

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