The Global Business Travel Association reported the domestic airfare for business travel for the current year and the previous year. Below is a sample of 12 flights with their domestic airfares shown for both years. Do not round intermediate calculations. Ho: Hd S Ha Hd > What is the p-value? 600 414 675 519 225 507 549 393 567 492 330 174 a. Formulate the hypotheses and test for a significant increase in the mean domestic airfare for business travel for the one-year period. t-value 0 0 (to 3 decimals) Degrees of freedom p-value is between 0.005 and 0.01 ✓ Using a 0.05 level of significance, what is your conclusion? We can conclude b. What is the sample mean domestic airfare for business travel for each year? Current Year Previous Year Current Year Previous Year 591 561 624 444 504 417 Current Year $ (to 2 decimals) Previous Year $ (to 2 decimals) c. What is the percentage change in the airfare for the one-year period? S that there has been a significance increase in business travel airfares over the one-year period. 492 399 393 378 312 336

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