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Q.4 A random vector (X, Y, Z) has joint density given by. f (x, y,z) = k exp [− 1/2 (2x2 − 2xy + y2 + z2 + 2x − 6y) .1. Compute k.2. Compute the expectations P(X), P(Y ) and P(Z).3. Compute the density of the random vector (X, Z).4. Compute the correlation coeffificient between X and Z and between X and Y .5. Let W = X + Z; compute the probability density of W. |
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