In the year 2006 the mean fare to fly from Charlotte, North Carolina, to Seattle, Washington, on a discount ticket was $267. A random sample of round-trip discount fares on this route last month gives:
$321 $286 $290 $330 $310 $250 $270 $280 $299 $265 $291 $275 $28
At the .01 significance level can we conclude that the mean fare has increased? What is the p-value?