Prove that xy = x y x y ,where x and y are the means
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Prove that σxy = x̅ y̅ – x̅ y̅ ,where x̅ and y̅ are the means of {xi} and {yi}, respectively, while x̅ y̅ denotes the mean of the product variable {xiyi}.
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We know that the covariance of two variables x and y is given by xy ...View the full answer
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