#reading-9-probability-concepts
Covariance is a measure of the co-movement between random variables
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Summary uared units of the original variable.
Standard deviation is the positive square root of variance. Standard deviation measures dispersion (as does variance), but it is measured in the same units as the variable.
<span>Covariance is a measure of the co-movement between random variables.
The covariance between two random variables R i and R j is the expected value of the cross-product of the deviations of the two random variables from their respective Summary
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