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1.Suppose the covariance between Y and X is 12, the variance of Y is 25, and the variance of X is 36. What is the correlation coefficient ( r ), between Y and X?
A) 0.013.
B) 0.000.
C) 0.400.
D) 0.160.
The correct answer was C)
The correlation coefficient is: r = 12/(5)(6) = 0.40
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发表于 2008-4-1 12:25
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