Question 7 • Statistical Modeling - Content Recovery - Part B
A doctor wants to determine if a new medication for cholesterol is more effective than the previous medication. The doctor informed a random selection of his patients of the new medication and asked them if they would like to participate in a drug trial to test the effectiveness of the new cholesterol medicine compared to the current medication. Twenty-five patients who were currently taking medication for cholesterol volunteered and were given the new medication. After two months, the patients’ cholesterol levels are checked.
Answer
A
This experiment will show the effectiveness of the new cholesterol medicine.
B
Because the doctor did not have every patient try the new medication, the doctor will not be able to determine the effectiveness of the new medicine.
C
Because the doctor did not have a different random sample of patients take the original medication, the effectiveness of the new medicine will not be able to be determined.
D
Because the doctor did not have a different random sample of patients not take any medication, the effectiveness of the new cholesterol medication will not be able to be determined.
Explanation
To find out whether the new medicine is more effective than the current one, the doctor needs to compare results from patients taking each medicine. All 25 volunteers received the new medication, so there is no group taking the original medication for comparison. A group taking no medication is not needed to answer this particular question.
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