Scenario: Cholesterol, Drug, and Obesity

Does a drug designed to lower cholesterol levels actually work?


To study this, researchers randomly select 40 adult males with high cholesterol and randomly assign them to one of two groups:

     • 20 subjects receive the drug

     • 20 subjects receive a placebo

After a 6-month regimen of taking the drug or placebo, the subjects’ cholesterol levels were measured.

Data and analysis

Here’s a summary of the cholesterol levels of the 40 subjects: