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 flights with their domestic airfares shown for both years. Do not round intermediate calculations.

Current Year	Previous Year		Current Year	Previous Year
384	339		378	378
480	450		678	288
513	297		306	264
285	255		354	600
285	432		456	372
306	276		561	483

a. Formulate the hypotheses and test for a significant increase in the mean domestic airfare for business travel for the one-year period.

	- Select your answer -<>=Item 1
	- Select your answer -<>=Item 2

What is the -value?

-value	(to 3 decimals)
Degrees of freedom

-value is - Select your answer -lower than 0.005between 0.005 and 0.01between 0.01 and 0.025between 0.025 and 0.05between 0.05 and 0.10between 0.10 and 0.20greater than 0.20Item 5

Using a level of significance, what is your conclusion? We - Select your answer -can concludecannot concludeItem 6 that there has been a significance increase in business travel airfares over the one-year period.

b. What is the sample mean domestic airfare for business travel for each year?

Current Year	$ (to 2 decimals)
Previous Year	$ (to 2 decimals)

c. What is the percentage change in the airfare for the one-year period? % (to 2 decimals)

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