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The correlation coefficient of AT&T and the market index, S&P500, is +.65, SDAT&T is .24, and the SDSP500 is .12. The correlation between Apple Computers

The correlation coefficient of AT&T and the market index, S&P500, is +.65, SDAT&T is .24, and the SDSP500 is .12. The correlation between Apple Computers and the S&P500 is +.15 and SDAP = .81.

a) Calculate beta for AT&T and Apple.

b) Compare the two and explain the results.

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