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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