The Kelley Blue Book provides information on retail and trade-in values for used cars and trucks. The

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The Kelley Blue Book provides information on retail and trade-in values for used cars and trucks. The retail value represents the price a dealer might charge after preparing the vehicle for sale. A 2006 Ford Mustang coupe has a 2009 Kelley Blue Book retail value of $13,015. We obtained the following asking prices, in dollars, for a sample of 2006 Ford Mustang coupes for sale in Phoenix, Arizona.

13,645 13,157 12,664 13,153 11,665 10,565 12,665 12,765 12,965 12,764


At the 10% significance level, do the data provide sufficient evidence to conclude that the mean asking price for 2006 Ford Mustang coupes in Phoenix is less than the 2009 Kelley Blue Book retail value?

Use the Wilcoxon signed-rank test to perform the required hypothesis test.

Dealer
A dealer in the securities market is an individual or firm who stands ready and willing to buy a security for its own account (at its bid price) or sell from its own account (at its ask price). A dealer seeks to profit from the spread between the...
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