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Competitive Stats
Q9Section I (Objective (Q1–Q80))9 of 79

Distribution Theory — expectation of a ratio of independent normal combinations

What is E(X1+X2+X3X42+X52+X62+X72)E\left(\frac{X_1+X_2+X_3}{X_4^2+X_5^2+X_6^2+X_7^2}\right) equal to?

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