Quisley's hypothesis is that listening to classical music improves intellectual performance.He randomly divides a mathematics class into two rooms.In room A,music by Mozart plays softly in the background during a lecture.In room B,the students listen to a lecture without background music.The independent variable is ____.

Question

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The independent variable is the variable that is changed or manipulated in an experiment, which in this case is whether music played during a lecture. This is the variable being tested to determine its effect on intellectual performance. The other options are either not directly relevant to the hypothesis or not mentioned in the scenario.

Quisley's Hypothesis Is That Listening to Classical Music Improves Intellectual