Let XXX be continuous with PDF f(x)=1π(1+x2)f(x) = \frac{1}{\pi(1+x^2)}f(x)=π(1+x2)1 for all x∈Rx \in \mathbb{R}x∈R. What is the expected value E[X]E[X]E[X]?
0
1
Does not exist
π\piπ