a student wants to predict his final exam grade and final class grade with 95% confidence.
The final grade has three components:
(1) an assignment (on which he scored 12 of 20);
(2) a midterm exam (on which he scored 14 of 30); and
(3) a final exam which he has not yet taken.
The weight of each component is as follows: assignment 20%; midterm exam 30%; and
final exam 50%. Below in blue are scores from 30 students who took the course last term
