Unformatted text preview: X and Y is given by f ( x;y ) = & 2 5 (2 x + 3 y ) ; ± x;y ± 1 ; otherwise : Find (a) E ( X ) and E ( Y ) ; (b) V ar ( X ) and V ar ( Y ) ; (c) Cov ( X; Y ) . 5. Let X be a random variable that is uniformly distributed on the interval [1,1]. Find (a) E ( X ) ; (b) E ( X 2 ) ; (c) V ar ( X 2 ) ; (d) E ( j X j ) : 1...
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 '07
 HONG
 Probability theory, probability density function, Simon Kwok

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