Here are the results from the study.
From the 681 titles on the Suggested Core Collections provided by the Federal Depository Library Program, the Cook Library contains 439 titles. This means the Cook Library has 64.4% of the titles. Also, I discovered that 24% of the items that the online catalog used at Cook Library, Anna, were not actually on the shelf. I thought this number was pretty high. But, I did notice that many of the missing items are available on online databases, so researchers can actually get to most of these documents. I will have more calculations later this week.