Let X be a random variable with PMF ( ) { X 2 la, px x =

Chapter , Problem 16

(choose chapter or problem)

Get Unlimited Answers
QUESTION:

Let X be a random variable with PMF ( ) { X 2 la, px x = 0, (a) Find a and E[Xj . if x = -3, -2, - 1, 0, 1, 2, 3, otherwise. (b) What is the PMF of the random variable Z = (X - E[xJ) 2 ? (c) Using the result from part (b), find the variance of X. (d) Find the variance of X using the formula var{X) = L:x (x - E[XJ) 2 px (X).

Questions & Answers

QUESTION:

Let X be a random variable with PMF ( ) { X 2 la, px x = 0, (a) Find a and E[Xj . if x = -3, -2, - 1, 0, 1, 2, 3, otherwise. (b) What is the PMF of the random variable Z = (X - E[xJ) 2 ? (c) Using the result from part (b), find the variance of X. (d) Find the variance of X using the formula var{X) = L:x (x - E[XJ) 2 px (X).

ANSWER:

Step 1 of 5

Given that,

Let X be a random variable with PMF

Add to cart


Study Tools You Might Need

Not The Solution You Need? Search for Your Answer Here:

×

Login

Login or Sign up for access to all of our study tools and educational content!

Forgot password?
Register Now

×

Register

Sign up for access to all content on our site!

Or login if you already have an account

×

Reset password

If you have an active account we’ll send you an e-mail for password recovery

Or login if you have your password back