The Global Business Travel Association (GBTA) reported the domestic airfare for business travel for the current year a flights with their domestic airfares (in $) shown for both years. Suppose GBTA wished to see if the average airfare for airfare for the previous year at a=,01. Current 352 760 558 451 252 660 Previous 348 749 548 456 253 640 For the hypothesis stated above, what is the critical value (in terms of "Current" minus "Previous")? a. None of the answers is correct O b. 2.821 OC. 2.764 O d. 3.365 e. 3.143

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