Find a 98 percent confidence interval for the paired difference 
Definitions:
Additional Working Capital
Extra funds that a company requires to finance its day-to-day operations beyond its current working capital.
Salvage Value
The evaluated resale price of an asset after its lifespan of usefulness.
Straight-Line Method
A depreciation technique where an asset loses an equal amount of value each year over its useful life.
Payback Period
The duration needed to recoup the expenses of an investment.
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