Let X and Y be independent random variables with nonzero variances. Find the correlation coefficient of W = XY and V = X in terms of the means and variances of X and Y.
Answer to relevant QuestionsLet X1 and X2 be a random sample of size n = 2 from the exponential distribution with pdf f(x) = 2e−2x, 0 < x < ∞. Find (a) P(0.5 < X1 < 1.0, 0.7 < X2 < 1.2). (b) E[X1(X2 − 0.5)2]. The number X of sick days taken during a year by an employee follows a Poisson distribution with mean 2. Let us observe four such employees. Assuming independence, compute the probability that their total number of sick days ...Let W = X1 + X2 + · · · + Xh, a sum of h mutually independent and identically distributed exponential random variables with mean θ. Show that W has a gamma distribution with parameters α = h and θ, respectively Let X denote the wing length in millimeters of a male gallinule and Y the wing length in millimeters of a female gallinule. Assume that X is N(184.09,39.37) and Y is N(171.93,50.88) and that X and Y are independent. If a ...If X is b(100,0.1), find the approximate value of P(12 ≤ X ≤ 14), using (a) The normal approximation. (b) The Poisson approximation. (c) The binomial.
Post your question