Which of the following describes a joint probability distribution for two discrete random variables, $X$ and $Y$?
Question 2
If $X$ and $Y$ are two random variables, what does the marginal probability distribution $P(X=x)$ represent?
Question 3
For two continuous random variables $X$ and $Y$, the joint probability density function (PDF) is given by $f(x,y)$. How is the marginal PDF of $X$, denoted as $f_X(x)$, calculated?
Question 4
Which of the following statements is true regarding conditional distributions?
Question 5
What does the covariance between two random variables $X$ and $Y$, denoted as $Cov(X,Y)$, measure?
