# Question

Prove the triangle inequality which states that

## Answer to relevant Questions

Two random variables X and Y have, μx = 2, μy = –1, σx = 1, σy = 4, and p X,Y = 1 / 4. Let U = X + 2Y and V = 2X –Y. Find the following quantities: (a)E [U] and E [V]; (b)E [U] , and E [V2]; (c)E [UV], Cov (U, V), ...Consider again the joint CDF given exercise 5.3. (a) For constants a and b, such that 0 < a < 1, 0 < b < 1 and a < b, find Pr (a < X < b). (b) For constants and, such that, 0 < c < 1, 0 < d < 1 and c < d, find Pr (c < y < ...Starting from the general form of the joint Gaussian PDF in Equation (5.40) and using the results of Exercise 5.35, show that conditioned on Y = y, X is Gaussian with a mean of μx + ρXY (σX / σY) (y – μY) and a ...A pair of random variables has a joint characteristic function given by Find E [X] and E [Y] Find E [XY] and Cov (X, Y). Find E [X2Y2] and E [XY3]. Let and be jointly Gaussian random variables with E [X] = 1, E [Y] = –2, Var (X) = 4, Var (Y) = 9, and ρX, Y. Find the PDF of Z = 2X – 3Y – 5.Post your question

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