A researcher compares freshmen, sophomores, juniors, and seniors with respect to how much fun they have while attending college (scale: 0=no fun at all, 1, 2, 3, 4, 5, 6 to 7=maximum amount of fun). (Note: Assume equal intervals in the scale and a true zero point.)

A. What is the independent variable?
B. What type or category of independent variable is used?
C. What is the dependent variable?
D. How many levels are there for the independent variable?
E. What is the scale of measurement for the dependent variable?