The New York Stock Exchange list of most active stocks for 2003 included the following randomly selected oil-related and non-oil-related stocks with closing prices for the for the year. Test the hypothesis that the median closing price for oil-related stocks is not significantly different from that of all non-oil-related stocks, for an = 0.05. (15 points)

Oil Related Stock Non-Oil Related Stock

Exxon 29.75 IBM 96.25

Mobil 25.16 AT&T 59.37

Texaco 31.15 Sony 15.25

Arco 42.00 Sears 30.16

Standard Oil 32.00 Tandy 50.75

Superior Oil 28.75 K Mart 22.00

GM 62.35 Mattell 16.80

Shell Oil 39.76 Citicorp 32.50

Chrysler 49.83 Digital 99.50

Haliburton 35.32 Apple 22.17