Question

multiple choice question
a study focused on hearing and its improvement following a standard operation procedure. all hearing tests had to be conducted in a soundproof room. in this instance, what was the role of the soundproof room?
○ a control factor
○ a conclusion
○ a dependent variable
○ a random sample

Explanation:

A control factor is a variable kept constant in a study to eliminate external interference. The soundproof room ensures consistent, quiet conditions for hearing tests, preventing outside noise from affecting results, so it acts as a control factor.

Answer:

a control factor