Suppose that X and Y have the following joint probability density function. 3 f(x, y) = x, 0 < x < 6, y > 0, x −4 < y < x +4 400 (a) Find E(XY). (b) Find the covariance between X and Y.

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Suppose that X and Y have the following joint probability density function.
3
X, 0 < x < 6, y > 0, x −4 < y < x +4
400
f(x, y)
=
(a) Find E(XY).
(b) Find the covariance between X and Y.
Transcribed Image Text:Suppose that X and Y have the following joint probability density function. 3 X, 0 < x < 6, y > 0, x −4 < y < x +4 400 f(x, y) = (a) Find E(XY). (b) Find the covariance between X and Y.
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fx,y=3x400      0<x<6, y>0, x-4<y<x+4

 

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