29. Missing POIs 1 (optional)

Question:

As you saw a little while ago, not every POI has an entry in the dataset (e.g. Michael Krautz). That’s because the dataset was created using the financial data you can find in final_project/enron61702insiderpay.pdf , which is missing some POI’s (those absences propagated through to the final dataset). On the other hand, for many of these “missing” POI’s, we do have emails.

While it would be straightforward to add these POI’s and their email information to the E+F dataset, and just put “NaN” for their financial information, this could introduce a subtle problem. You will walk through that here.

How many people in the E+F dataset (as it currently exists) have “NaN” for their total payments? What percentage of people in the dataset as a whole is this?