In year 2007 the mean fare to fly from Chariotte, North Carolina, to Seattle, Washington, on the 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 |
$281 |
At the 0.01 significance level can we conclude that the mean fare has raised? Find out the p-value?