Question Help ▼ A recent study was conducted to determine whether a drug was effective at helping east-bound jet passengers adjust to jet lag. Subjects were randomly assigned either to one of three...

Extracted text: Question Help ▼ A recent study was conducted to determine whether a drug was effective at helping east-bound jet passengers adjust to jet lag. Subjects were randomly assigned either to one of three different doses of the drug (low, medium, high) or to a placebo, flown east in a plane in which they could not drink alcohol or coffee or take sleeping pills, and then examined in a lab where their state of wakefulness was measured and classified into categories (low, normal, alert). If we test whether treatments for jet lag are associated with wakefulness, are we doing a test of independence or of homogeneity? Explain. Choose the correct answer below. O A. It would be a test of independence because there was more than one sample. O B. It would be a test of homogeneity because the passengers were randomly assigned to different groups. O C. It would be a test of homogeneity because there was only one sample. O D. It would be a test of independence because the people are being separated into more than two categories (low, medium, high).