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QUESTION 8 For a laboratory assignment, if the equipment is working, the density function of the observed outcome is f(x)= 2(1-x), 0. 0 <

QUESTION 8 For a laboratory assignment, if the equipment is working, the density function of the observed outcome is f(x)= 2(1-x), 0. 0 < x <1 elsewhere Find the standard deviation of X. QUESTION 9 For the random variables X and Y whose joint density function is given by f(x)=3 (x+2y), 0x1, 0y1 0. elsewhere Find the covariance.

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