Question

The effect of the time of day a science class is taught on test scores is being

studied in an experiment. Giving every student in the experiment the same
final exam is an example of which experimental design principle?

Answer 1

Amount of homework given

Explanation:

Correct!

Answer 2

If you have answer choices that would be helpful.

If not I would assume that it means that giving every student the same test is an example of a controlled variable.