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6. The joint pmf of random variables X and Y is given below: a. Find x,y,x2,y2,Cov(X,Y), and
1,1,1/2,1/2,1/4,1/2 b. Sketch the support of X and Y c. Find the least squares regression line and
add it to the graph from part b. Y=1/2+1/2x

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