An Administrator Believes That the Placement of Motivational Posters on the Walls

Multiple Choice

An administrator believes that the placement of motivational posters on the walls in classrooms of academic buildings will lead to increased grade-point averages at his school.To test his theory,in one of the academic buildings he randomly assigns certain classrooms to have the posters while others do not.None of the remaining four buildings on campus have any posters placed in their classrooms.What is the independent variable in this study?

A) Classroom wall hangings
B) Gender of the student
C) Academic institution
D) Grade-point average