Discrete random variable
Consider a discrete random variable X, with the following probability distribution.
X
0
1
2
4
8
Pr(X = X)
0.2
0.3
0.15
0.05
A) Find the mean E(X) for this variable.
B) Find E(X^2) for the variable X
C) Find the variance Var(X) for this variable.
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