HL AA · Statistics and Probability
Discrete probability distributions — expectation and variance
E(X), Var(X), and the shortcut Var(X) = E(X²) - [E(X)]². HL AA Paper 1 tests these algebraically without a GDC.
Practise Discrete probability distributions — expectation and variance with AI marking
Open the full HL AA engine — every question in this unit is worked through with instant AI-graded feedback on your handwritten workings.
Open HL AA Statistics and Probability →
Related in Statistics and Probability
Free tools you might want