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4.2 Symmetric CDF. If the joint CDF F(x, y) of (X, Y ) is symmetrical about x and y (i.e., Fx,y(x, y) = Fx,y(y, x)),

4.2 Symmetric CDF. If the joint CDF F(x, y) of (X, Y ) is symmetrical about x and y (i.e., Fx,y(x, y) = Fx,y(y, x)), do X and Y have an identical marginal PDF and an identical CDF? Justify your

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