The Global Business Travel Association (GBTA) reported the domestic airfare for business travel for the current year and the previous year. Below is a sample of 6 Flights with their domestic airfares (in $) shown for both years. Suppose GBTA wished to see if the average airfare for the current year is greater than the average airfare for the previous year at a=.1. Current 355 743 560 449 263 651 Previous 348 746 549 440 250 652 or the hypothesis stated above, what is the critical value (in terms of "Current" minus "Previous")? a. 1.372 b. 1.440 C. 1.476 d. 1.383 Oe. None of the answers is correct

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