A travel association reported the domestic airfare (in dollars] for business travel for the current year and the previous year. Below is a sample of 12 ights with their domestic airfares shown for both years. Previous Year 303 453 4?4 236 2?.5 432 535 650 545 54? 503 580 {a} Formulate the hypotheses and test for a significant increase in the mean domestic airfare for business travel for the oneyear period. I o 2 Q. I" '. .J a m c o. EL .-'\\ D D! O D! '9: CL CL II I I II II I \""51. \"1.0.. . CL o. Calculate the test statistic. (Use current year airfare previous year airfare. Round your answer to three decimal places.) :I Calculate the pyalue. [Round your answer to four decimal places.) nvalue = :l Using a 0.05 level of significance, what is your conclusion? O Reject H. We cannot conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period. O Reject H . We can conclude that there has been a significant increase in the mean domestic airfare for business travel for the one-year period. O Do not reject H . We cannot conclude that there has been a significant increase in the mean domestic airfare for business travel for the one- year period. O Do not reject H . We can conclude that there has been a significant increase in the mean domestic airfare for business travel for the one- year period. (b) What is the sample mean domestic airfare (in dollars) for business travel for each year? current previous (c) What is the percentage change in mean airfare for the one-year period? (Round your answer to one decimal place.)