IB Maths AI SL 4.9 – Normal Distribution Notes

IB Maths AI SL 4.9 Notes – Normal Distribution

This IB Maths AI SL 4.9 resource covers the Normal Distribution and is fully aligned with the IB Applications and Interpretation syllabus

Students learn the key properties of a normal distribution, including symmetry, mean and standard deviation, and correct notation ( X ~ N(\mu, \sigma^2) ). The Empirical Rule (68–95–99.7) is introduced to estimate probabilities, and students use their GDC to calculate probabilities with normalcdf and inverse normal values with invNorm.

Structured examples and exam-style practice questions (including IQ scores, bolt lengths, and inverse normal problems such as finding the top 10%) help students build confidence in both interpretation and calculator-based computation.

Ideal for IB Maths AI SL teachers teaching Topic 4 statistics, this ready-to-use resource strengthens exam technique while saving valuable planning time.