Problem
A medical study aimed to investigate to find the dosage of a new medication that best treats hypertension. Hundred-ten patients with hypertension were randomly assigned to three groups: (i) 120 milligrams of the new drug, (ii) 130 milligrams of the new drug, and (iii) 140 milligrams of the new drug. Each patient's blood pressure was measured every day for 4 weeks. What hypothesis testing technique should the researcher use to analyze the data?