The normal distribution: parameters, bell shape and the 68:95:99.7% rule

What this note covers

1. Where the normal distribution sits in Topic 3
2. The two parameters: mean and standard deviation
3. Why so many measurements are approximately normal
4. The 68:95:99.7% rule and the standard slices of area
5. Turning areas into counts, percentages and probabilities
6. Working backwards: finding the mean or the standard deviation
7. Decoding the wording and setting out the answer
8. How this is examined in the SACE Stage 2 paper

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