Problem: To test a new drug for treating diabetes, a drug company conducted a single-blind experiment. A sample of 300 subjects was selected. One-third of the subjects were randomly assigned to receive the new drug, one-third of the subjects were randomly assigned to receive the old drug, and the remaining subjects receive a placebo. To compare the effectiveness of the treatments, the glucose level of the subjects was measured every three months for one year. How many treatments did this experiment compare? Need Assignment Help?