In an article published in The Journal News (Hamilton, Ohio) on February 21, 1993, Lew Sichelman (United Features Syndication) wrote the following:
Despite a relatively weak market, housing prices moved slightly higher last year.
Table 18.16 gives the average 1991 and 1992 prices for new and used homes (in thousands of dollars) for six randomly selected U.S. housing markets. Use a nonparametric test to attempt to show that housing prices increased from 1991 to 1992. Use a = .05 and explain your conclusion.
TABLE 18.16
1991 and 1992 Average Prices for New and Used Homes (in Thousands of Dollars) for Six Randomly Selected Housing Markets

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Housing Market 1991 Average Price 992 Average Price Minneapolis, Minn. $134.2 St. Louis, Mo. Columbus, Ohio Baltimore, Md Pittsburgh, Pa. Seattle, Wash. 125.4 127.7 164.6 95.8 168.3 $126.3 159.2 126.6 166.0 110.1 179.2