A professor was interested in the relationship between a student's rank on an oral exam and the student's rank on a written exam. The professor selected eight students at random and ranked their scores for both the oral exam and the written exam. The following data were recorded: 
Find and interpret the rank correlation between a student's rank on the oral exam and the student's rank on the written exam.
Definitions:
Annual Cash Revenues
The total money received from sales activities, without accounting for any deductions or costs, over the course of a year.
Hurdle Rate
The minimum rate of return on an investment that is required by a manager or investor to proceed with the investment.
Income Taxes
Taxes imposed by the government on the income generated by businesses and individuals.
Net Present Value
A financial metric that calculates the present value of all cash flows (both incoming and outgoing) associated with an investment, adjusted for time and interest.
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