Twenty-one executives in a large corporation were randomly selected to study the effect of several factors on annual salary (expressed in $000s). The factors selected were age, seniority, years of college, number of company divisions they had been exposed to, and the level of their responsibility. The results of the regression analysis follow: 
What proportion of the total variation in salary is accounted for by the set of independent variables?
Definitions:
Train Station
A facility on a railway line where trains regularly stop to load or unload passengers and/or freight.
Cross-Dock
A logistics practice where incoming shipments are unloaded, sorted, and directly reloaded onto outbound vehicles for delivery to the final destination, minimizing storage time.
Use Fee
A charge for using a service, facility, or equipment, typically levied to cover maintenance and operational costs.
Congestion
A condition of overcrowding or overburdening, often referring to heavy traffic or network data leading to delays.
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