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Competitive Stats
Q25Section I (Objective (Q1–Q80))25 of 80

Probability — recovering Var(Y) from covariance and correlation

If Var⁡(X)=4\operatorname{Var}(X) = 4, Cov⁡(X,Y)=32\operatorname{Cov}(X, Y) = 32 and correlation coefficient r(X,Y)=0.8r(X, Y) = 0.8 for some bivariate data, then what is V(Y)V(Y) equal to?

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