Statistics - difference between joint distribution and joint density?

Kuma

1. The problem statement, all variables and given/known data

This is just a general question about understanding.

What is the difference between a joint distribution functions vs. a joint density function.


2. Relevant equations



3. The attempt at a solution

Are joint density functions basically the joint distributions of continuous Random variables and joint distribution pertain to discrete random variables?

lanedance

see bleow
http://en.wikipedia.org/wiki/Joint_p...y_distribution

personally i would loosely call them the same thing, probabilty density function is usually used for continuous RVs, whilst probabilty mass function is used for discrete RVs and both are examples of distributions