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If the coefficient correlation between x and y is 0.4, the covariance between them is 0.8 and standard deviation of y is 0.2, variance of

If the coefficient correlation between x and y is 0.4, the covariance between them is 0.8 and standard deviation of y is 0.2, variance of x would be 0.1 10 100 0.01 1

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