# Question

Suppose two random variables are related by Y = a X2 and assume that is symmetric about the origin. Show that ρ X, Y = 0.

## Answer to relevant Questions

Let and be random variables with means μx and μy, variances σ2x and σ2y, and correlation coefficient ρ X, Y. (a) Find the value of the constant which minimizes. (b) Find the value of when is given as determined in part ...Find an example (other than the one given in Example 5.15) of two random variables that are uncorrelated but not independent. Two random variables have a joint Gaussian PDF given by (a) Identify σ2x, σ2y, and ρX, Y. (b) Find the marginal PDFs, f X (x) and f Y (y). (c) Find the conditional PDFs, f X| Y (x| y) and f Y| X (y| x) A pair of discrete random variables has a PGF given by (a) Find the means, E [M] and E [N]. (b) Find the correlation, E [MN]. (c) Find the joint PMF, P M, N (m, n). Suppose is a Rayleigh random variable and is an arcsine random variable, so that Furthermore, assume X and Y are independent. Find the PDF of Z = XY.Post your question

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