X1, X2 are random variables with zero expectancies and standard deviations \(\displaystyle \sigma_1,\, \sigma_2\) respectively. The correlation coefficient of X 1 and X2 is \(\displaystyle \rho\).
I don't have the probability distributions of the variables,so i tried using Markov and Chebyshev's inequalities.I also tried to use bounds on a quadratic form to find an upper bound outside the given rectangle.I t can be assumed that the expectancies are zero.
I really need a clue or some help.
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