Calculating z-scores and applying the 68-95-99.7 rule

What this note covers

1. What is a z-score?
2. Calculating z-scores: worked examples
3. The 68-95-99.7 Rule (Empirical Rule)
4. Applying the empirical rule: worked examples
5. Identifying unusual data values
6. Comparing scores across different distributions
7. Exam technique and common question types

7 sections · 12 key terms & formulas · 6 common mistakes