Discrete variable's values are also "disjoint," so we have the gaps in a discrete variable's probability distribution graph. While the formula for the expected value of a discrete variable may seem ...

Boyan Dimitrov, Stefanka Chukova, David Green, Jr. Periodic random environments and mechanisms of their effect on imbedded random variables are discussed. The variables under consideration represent ...

Let F be a probability distribution on R. Then there exist symmetric (about zero) random variables X and Y whose sum has distribution F if and only if F has mean zero or no mean (finite or infinite).