According to BIGresearch, holiday shoppers spent an average of $373 over the Thanksgiving weekend in 2008. The following data show the amount spent by a random sample of holiday shoppers during the same weekend in 2009:

$427

$274

$370

$238

$222

$215

$360

$434

$387

$395

$323

$63

$415

$429

$377

$279

Retailers were concerned that the recent economic downturn was going to affect holiday sales.

Assuming sales are normally distributed, at the 5% alpha level is there evidence to support these concerns? Explain your answer.