Explain the Completely Randomized Design
-A drug company wanted to test a new acne medication. The researchers found 500 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 acne symptoms decreased was recorded and compared. What type of experimental design is this
A) completely randomized design
B) randomized block design
C) matched-pairs design
D) single-blind design

Question

Quizplus · Accepted Answer

This is a completely randomized design because participants are randomly assigned to either the treatment group (receiving the new drug) or the control group (receiving a placebo) without any consideration of blocking or pairing based on specific characteristics.