Scatterplots, direction, form and strength, and the correlation coefficient r

What this note covers

1. Set up a scatterplot from paired measurements
2. Describe direction, form and strength
3. Understand what the correlation coefficient measures
4. Compute and verify r
5. Recognise outliers, clusters and restricted ranges
6. Interpret correlation without claiming causation

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