Makers of generic drugs are required to show that their generic drugs do not differ significantly from the “reference” or brand name drugs that they imitate. One aspect in which the generic drugs might differ is their extent of absorption in the blood. Twelve subjects were available for the study. Six were randomly selected to receive the generic drug first and then, after a washout period, receive the “reference” drug. The remaining six received the “reference” drug first, followed by the generic drug after the washout period. What are the appropriate hypotheses for this test? H0: μG – μR = 0 vs. Ha: μG – μR > 0 H0: μG – μR = 0 vs. Ha: μG – μR < 0 H0: μd = 0 vs. Ha: μd > 0 H0: μd = 0 vs. Ha: μd≠ 0 H0: μd = 0 vs. Ha: μd < 0 Please help, I am awful at deciding which hypothesis is correct! From the question I want to say it is either A or B because it is asking for the difference but there wasn't any reference to a greater than or less than so I want to choose D because it is only whether or not the test equal the mean. Am I on the right track?