probability-discrete randon variables, pmfs
I've never even covered this stuff before guys :S The below numbers where in a table but I couldnt recreate it on here :(, hope you clever people can figure it out :)
Discrete random variables X and Y have joint probability mass function:
Y=0 & X=0 =>0.2
Y=1 & X=0 =>0.2
Y=2 & X=0 =>0.1
Y=0 & X=1 =>0.2
Y=1 & X=1 =>0.3
Y=2 & X=1 =>0.0
(a) Find the marginal means and variances of both X and Y .
(b) Find the conditional mean of Y given X = 1.
(c) Find the correlation between X and Y