IB skill practice

Standardise normal variables

Convert a normally distributed value to a z-score using mean and standard deviation.

Paper 1, Paper 2 5 marks Difficulty 4

Standardise normal variables - context check

A community program measurement is normally distributed with mean \(69\) and standard deviation \(5\). Standardise \(x=83\). Enter the requested value and choose the interpretation that matches the result.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.