How does the amount of
studying a student
does affect the
grade the make on
a test?

It truly varies on how well you know the material and how much material it is

Explanation:

such as if you study like 20 minutes a day for a week before a test you are more likely to do better because you have a better grasp on the material the teacher has given you or if its a very small amount of material 10 minutes a day 2 days before a test could do just as well but never try to do it all the night before most of the time it won't help

answer; night terrors;