In Order to Test the Effectiveness of a Drug Called

question 95

Multiple Choice

In order to test the effectiveness of a drug called XZR designed to reduce cholesterol levels,9 heart patients' cholesterol levels are measured before they are given the drug.The same 9 patients use XZR for two continuous months.After two months of continuous use,the 9 patients' cholesterol levels are measured again.The comparison of cholesterol levels before versus after administering the drug is an example of testing the difference between:

• A)Two means from independent populations.
• B)Two population variances from independent populations.
• C)Two population proportions.
• D)Matched pairs from two dependent populations.

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Definitions:

Brachiocephalic Arteries

Major blood vessels originating from the aortic arch that supply blood to the right arm and the head and neck.

Tunica Intima

The innermost layer of an artery or vein, consisting of a thin layer of endothelial cells that line the interior surface of the vessel.

Blood Vessel Walls

The structured layers composing the sides of arteries, veins, and capillaries, responsible for maintaining blood pressure and controlling blood flow.

Tunica Media

The middle layer of the wall of a blood vessel or hollow organ, consisting primarily of smooth muscle cells and elastic fibers.