Probability mass function
Suppose X has pmf (probability mass function) f(x)=1/5, x=1,2,3,4,5.
Compute E(X) and E(X^2) and use those two results to find E[(X+2)].
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Suppose X has pmf (probability mass function) f(x)=1/5, x=1,2,3,4,5. Compute E(X) and E(X^2) and use those two results to find E[(X+2)].
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