A pharmaceutical company has developed a new drug for treating high blood pressure. They would like to compare its effects to those of the most popular drug currently on the market. Two hundred volunteers with a history of high blood pressure and who are currently not on medication are recruited to participate in a study.
a. Explain how the researchers could conduct a randomized experiment. Indicate the experimental units, the response and explanatory variables, and the treatments.
b. Explain what would have to be done to make this study double-blind.