Data Set 1-3: For her research project, Susan gathered data from 76 students who filled out a questionnaire about exercise and GPA. From the exercise portion, students were classified as sedentary, moderate, or vigorous exercisers. GPA's were expressed in the usual decimal form
-In Susan's experiment (Data Set 1-3), the fact that students were classified as sedentary, moderate, or vigorous exercisers constitutes
A) the independent variable
B) the dependent variable
C) a controlled extraneous variable
D) an uncontrolled extraneous variable.

Question

Quizplus · Accepted Answer

The classification of students as sedentary, moderate, or vigorous exercisers is the independent variable because it is the variable that Susan manipulates or categorizes to see its effect on the dependent variable, which in this case would be the GPA.

Data Set 1-3: for Her Research Project, Susan Gathered Data