A researcher tests whether music tempo (slow, medium, fast) affects test performance by playing one of three tempos during a 15-minute quiz. Each student is randomly assigned to one tempo.
What is the factor in this experiment, and how many levels does it have?
- A
Time, with 3 levels
- B
Student, with 3 levels
- Ccheck_circle
Music tempo, with 3 levels
- D
Test score, with 3 levels
Explanation
The factor (explanatory variable being manipulated) is music tempo, and it has three levels (slow, medium, fast).