Discrete Random Variables

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7 Terms

1
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E(X)

Σ xP(X=x)

2
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E(X2)

Σ x2P(X=x)

3
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Var(X)

E(X2) - (E(X))2

4
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E(g(x))

Σg(x) P(X=x)

5
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E(aX + b)

aE(X) + b

6
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E(X + Y)

E(X) + E(Y)

7
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Var(aX + b)

a2Var(X)