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 better grades at his school.To test his theory,he randomly assigns certain classrooms within the university's Faculty of Science to have the posters while others do not.None of the remaining four faculties will have any posters placed in their classrooms.What is the independent variable in this study?

A) the five different faculties
B) the presence or absence of classroom posters
C) the classrooms
D) student grades