Question

Suppose that the following table is your record of exam grades in your Principles of Economics course:

Use the data to make up a table of total, average and marginal grades for FIVE exams

Exam Date	Grade	Comment
September 30	65	A Slow Start
October 28	75	A Big Improvement
November 26	90	Happy Thanksgiving!
December 13	85	Slipped a little
January 24	95	A Fast Finish!

Answer 1

Exam Date	Grade	Marginal
Sep-30	65
Oct-28	75	10
Nov-26	90	15
Dec-13	85	-5
Jan-24	95	10
Total	410
Average	82

Marginal grade is the increase/decrease in the grade from the last grade. Average is the total divided by the five exams.