The key part of the equation is good-data

$$\frac{1}{2} $$

\(E=mc^2\)

$$ \frac{1}{2} $$

\(E=mc^2\)

$$ \frac{1}{2} $$

$$ \frac{1}{2} $$

$$\frac{1}{2} $$
\(E=mc^2\) \(E=mc^2\)

$test$

\(E=mc^2\)

\(E=mc^2\)

ρA,B=Cov(γA,γB)σA.σB\rho_{A,B}=\frac{Cov(\gamma_A,\gamma_B)}{\sigma_A.\sigma_B}