A drug company wanted to test a new depression medication. The researchers found 300 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. What type of experimental design is this?
A) matched-pairs design
B) single-blind design
C) completely randomized design
D) randomized block 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 matching or blocking based on other variables.

A Drug Company Wanted to Test a New Depression Medication