Maddie does an experiment to test whether exercising gives her more energy. She spends one week exercising every day, and one week not exercising at all. For both weeks, she rates her energy level at the end of the day on a scale of 1-10. In her study, the independent variable is
A)her daily rating
B)whether or not she exercises on a given day
C)her average daily rating for each week
D)Maddie
E)none of the above are independent variables

Question

Quizplus · Accepted Answer

The independent variable is the factor that is changed or controlled in a scientific experiment to test the effects on the dependent variable. In Maddie's experiment, whether or not she exercises on a given day is the independent variable because it is what she changes to observe how it affects her energy levels (the dependent variable).

Maddie Does an Experiment to Test Whether Exercising Gives Her