Quizzol

QUESTION:

Students in a large statistics class were randomly divided into two groups. The first group took the midterm exam with soft music playing in the background while the second group took the exam with no music playing. The exam scores of the two groups were then compared.

This experiment was not blind because:

students were allowed to keep their eyes open while taking the exam.

students were randomized into the two groups.

some of the students did not study for the exam.

the exam was too long.

the students knew whether or not music was playing while they were taking the exam.

ANSWER:

the students knew whether or not music was playing while they were taking the exam.

Good job! "Blinding" in study design is when the subjects don’t know which treatment they’re getting. In this case, the treatments are background music or no background music. The students would certainly be aware of whether music was playing during the exam, so they would know which treatment they received.

Posted by Cleveland on September 19, 2024