Two-variable data
Two-way tables: joint, marginal and conditional proportions, Association between categorical variables, Scatterplots and correlation, The least-squares regression line, Residuals and residual plots, Interpreting a regression model: slope, r², extrapolation, Outliers, leverage and influential points
Two-way tables, correlation, regression lines
Practice
Lessons, in order
- 1. Two-way tables: joint, marginal and conditional proportions
- 2. Association between categorical variables
- 3. Scatterplots and correlation
- 4. The least-squares regression line
- 5. Residuals and residual plots
- 6. Interpreting a regression model: slope, r², extrapolation
- 7. Outliers, leverage and influential points