Suppose that the following table is your record of exam grades in your Principles of Economics course:
|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!|
Use these data to make up a table of total, average, and marginal grades for the five exams.
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