IB Maths AA HL SL 4.9 Normal distribution
IB Maths AA HL SL 4.9 Normal distribution
Practise normal distribution probability, inverse normal values, standardising with z, and interpreting shaded regions, percentages and parameters.
How this is tested
- find probabilities such as P(W<170) or P(170<W<185) from a normal model and sketch
- use inverse normal or z=(x-μ)/σ to find a cut-off value, μ, σ or a constant such as A
- use symmetry and standard normal facts, including the 0.68 central area within 1 SD