Let the random variable, X have the survival function SX(x) =e(−x/80), for x>0.Then the mean of that random variable equals 1/80. True or False? (show work/calculations)
Let the random variable, X have the survival function SX(x) =e(−x/80), for x>0.Then the mean of...
Let X be a random variable with support Sx = [−6, 3] and pdf f(x) = 1/81x^2 for x ∈ SX , 0 otherwise. Consider the random variable Y = max(X, 0). Calculate the CDF of Y , FY (y), where y is any real number.
Let X be a random variable with probability density function a) Find the mean of X b) Find the standard deviation of X round to four decimal places. c) Let G = X2 Find the probability density function fG of G Show work for each part plz f(x) = { 1 x (3-X) it osx=2 Co otherwise
Let X variable Y by be a normal random variable with mean 0 and variance 1. We define the random y2 if x 20, Y= (a For t E R, compute Mr()-Elen'], the moment generating function of Y. Compute EY
(10 points) Let X be a random variable with support Sx = (-6, 3) and pdf f(x) = $1x2 for ce Sx, zero otherwise. Consider the random variable Y = max(x,0). Calculate the CDF of Y, Fy(y), where y is any real number.
Let the random variable X have the pdf f(x) = e^(-x) for 0 < x < 1, and 0 elsewhere. Compute the probability that the random interval (X; 3X) includes the point x = 3. What is the expected value of the length of the interval?
Let the random variable X follow a normal distribution with a mean of μ and a standard deviation of σ. Let X 1 be the mean of a sample of 36 observations randomly chosen from this population, and X 2 be the mean of a sample of 25 observations randomly chosen from the same population. a) How are X 1 and X 2 distributed? Write down the form of the density function and the corresponding parameters. b) Evaluate the statement:...
1. Let the random variable X have the density function k for 0 f (ar) 0 elsewhere. If the mode of this distribution is at x =-42, then what is the median of X?
4. (30pts) A continuous random variable X has the probability density function: hx - 1 sx 32 f(x) =Jo-hx 2 x 3 0 x >3 which ean bo graphed as f(x) 1 2 a) Find h which makes f(x) a valid probability density function b) Find the expected value E(X) of the probability density function f(x) c) Find the cumulative distribution function F(x). Show all you work
Let the random variable X and Y have the joint probability density function. fxy(x,y) lo, 3. Let the random variables X and Y have the joint probability density function fxy(x, y) = 0<y<1, 0<x<y otherwise (a) Compute the joint expectation E(XY). (b) Compute the marginal expectations E(X) and E(Y). (c) Compute the covariance Cov(X,Y).
6. Let X be a continuous random variable whose probability density function is: 0, x <0, x20.5 Find the median un the mode. 7. Let X be a continuous random variable whose cumulative distribution function is: F(x) = 0.1x, ja 0S$s10, Find 1) the densitv function of random variable U-12-X. 0, ja x<0, I, ja x>10.