Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they each graded the same 10 exams, with the following results: 
What is the critical value of F at the 0.05 level of significance?
Definitions:
Free Cash Flow
Cash Flows from Operating Activities less Dividends less Capital Expenditures.
Operating Activities
The primary revenue-producing activities of an entity and other activities that are not investing or financing activities.
Capital Expenditures
Large spending by a company on physical assets like property, plant, and equipment, intended to be used for more than one year.
Financing Activities
Transactions and events whereby resources are obtained from, or repaid to, owners (equity financing) and creditors (debt financing).
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