The students in Mr. Bertram's class are very noisy when he leaves the room but become quiet when he returns. If this were an experiment, what would the independent variable be?
A) the level of noise when Mr. Bertram was out of the room
B) the change in the level of the classroom noise
C) Mr. Bertram's presence or absence in the room
D) the punishment for being noisy

Question

Quizplus · Accepted Answer

The independent variable is the condition manipulated by the experimenter to observe its effect on the dependent variable. In this scenario, Mr. Bertram's presence or absence is the condition being changed to observe its effect on the noise level, making it the independent variable.

The Students in Mr