A researcher is interested in determining the effectiveness of a new medication that may reduce blood pressure for individuals who have higher than average blood pressure. To determine the effectiveness of the medication, the researcher uses 240 volunteers who have high blood pressure. Volunteers are assigned randomly 50 milligrams of the medicine, 100 milligrams of the medicine, or a placebo. The subjects' blood pressure is measured at the beginning and end of the study. Part A: Identify the subjects, treatments, and response variable.

Part B: What is the advantage of the random assignment of treatment?

Part C: What is an advantage of using a placebo?

Part D: What is a disadvantage of using volunteers?

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )