2. Consider two random variables X and Y. Prove that the correlation coefficient px,y satisfies -1 2. Consider two random variables X and Y. Prove
2. Consider two random variables X and Y. Prove that the correlation coefficient px,y satisfies -1
2. Consider two random variables X and Y. Prove that the correlation coefficient px,y X-E[X] Y-E[Y] 2 satisfies 1 S px,y 1. Hint: Consider the function E (
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