Explain the Completely Randomized Design
-A drug company wanted to test a new depression medication. The researchers found 700 adults aged 25-35 and randomly assigned them to two groups. The first group received the new drug, while the second received a placebo. After one month of treatment, the percentage of each group whose depression symptoms decreased was recorded and compared. Identify the experimental units.
A) the 700 adults aged 25-35
B) the percentage who had decreased depression symptoms
C) the drug (medication or placebo)
D) the one month treatment time

Question

Quizplus · Accepted Answer

The experimental units are the individuals or objects that are randomly assigned to different treatments in an experiment. In this case, the 700 adults aged 25-35 are the experimental units because they are the ones receiving the treatments (the new drug or placebo).