CAIE: A Level - Mathematics 9709 - Probability and Statistics 1

Discrete Random Variable / Expectation and Variance

KEYPOINTS:

Mean OR Expected Value = μ = E(X) = ∑xp
Variance = Var(X) = ∑(x²p) – {E(X)}²
Standard Deviation is the Square Root of Variance [S.D = \(\sqrt{Var}\)]

Past Papers Topic Wise Questions A Level: Mathematics 9709 - Probability and Statistics 1 Discrete Random Variable | Expectation and Variance

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