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July 5, 2015

Homework Help: statistics

Posted by Joel on Friday, February 11, 2011 at 1:38pm.

the correlation between two random variables X and Y is p=-0.75.it is given that X=1,2or3 with equal probability of 1/3 and Y=-1,-2or-3 with equal probability of 1/3.the covariance is equal to?i need help.i have been struggling to get the answer>

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