E(X) = μ = −4
E(X²) = 20
Var(X) = σ²(X) = E(X²) − E(X)² = 20 − 16 = 4
σ(X) = 2
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Verified answer
E(X) = μ = −4
E(X²) = 20
Var(X) = σ²(X) = E(X²) − E(X)² = 20 − 16 = 4
σ(X) = 2
Get math photo app