Interpolation, extrapolation, long-term relative frequency, outliers and statistical misrepresentation

What this note covers

1. Read the axes before you read the trend
2. Interpolation and extrapolation
3. Trend, line of best fit and making a prediction
4. Long-term relative frequency and the likelihood of an event
5. Outliers: spotting them, testing them and deciding what to do
6. How graphs and statistics mislead
7. Sample size, limitations and a conclusion you can defend
8. How interpretation is examined, and what separates a top-band answer

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