The normal distribution, z-scores and inverse-normal calculations

What this note covers

1. When a normal model is suitable
2. Standardising to the standard normal
3. Interval probabilities with technology
4. Tails, complements and symmetry
5. Quantiles and percentiles
6. A reliable modelling workflow
7. Finding an unknown mean from a tail probability
8. A central normal interval and its cutoff

8 sections · 10 key terms & formulas · 6 common mistakes