[Expert Solution]: – In order to study a new drug’s ability…

– In order to study a new drug’s ability to lessen migraine headache symptoms, 150 people who have regular migraines were put into groups and given different instructions: – Group 1 – “when you feel your migraine starting, take 500 mg of Excedrin” (Excedrin a combination of Tylenol, aspirin and caffeine that has been used for years and works for some people’s migraines) – Group 2 – “when you feel your migraine starting, take 500 mg of NewDrug” – Group 3 – “when you feel your migraine starting, put clean dish towel in mouth and clench teeth”