Joint probability mass function
The joint probability mass function of a discrete random vetor
is a function
![[eq1]](http://images2.statlect.com/joint_probability_mass_function__2.png)
such
that![[eq2]](http://images1.statlect.com/joint_probability_mass_function__3.png)
In
other words, the joint probability mass function evaluated at the point
is equal to the probability that the random vector
takes the value
.
Go to the lecture entitled Random vectors for an introduction to joint probability mass functions.
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