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Homework Help: Probability and Statistics Calc Based

  1. Jul 5, 2015 #1
    1. The problem statement, all variables and given/known data
    that it is exact...

    X and Y are discrete random variables with joint pmf

    Chart attached

    (a) Find V ar(X) and Var(Y).
    (b) Find Cov(X; Y).
    (c) Find the correlation of X and Y.
    (d) Find the conditional distribution of X given that Y= 3

    2. Relevant equations

    Trying to check my answers to see if i am correct.

    3. The attempt at a solution

    a. Var(x) = 0.8 Var(Y) = 1
    b. 0.4
    c. 0.1414
    d. 1/5;1/5;3/5

  2. jcsd
  3. Jul 5, 2015 #2
    What is pmf?
  4. Jul 5, 2015 #3

    probability mass function
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