x has mean and standard deviation 2 and 2 while y has a mean and standard deviation of 1 and 4. The covariance of x and y is 2. So, the slope of the regression line of y on x is:
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Given that Cov(X,Y) = 2, we have: Cov(X,Y) = E[(X - 2)(Y - 1)] = 2 Show more…
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