Types
When to Use what
see: quantitative and qualitative variables
| Variables | Plot | Numerical Summary Format |
|---|---|---|
| 1 Qualitative | Simple Barplot | frequency table Most popular category |
| 2 Qualitative | Double barplot | contingency table Most popular category |
| 1 Quantitative | histogram & boxplot  | Mean, median, SD, IQR, range |
| 2 Quantitative | Simple scatterplot | correlation coefficient Linear model |
| 1 Qualitative + 1 Quantitative | Comparative boxplot & strip plot & Filtered histogram   | |
| 2 Quantitative+ | Filtered scatterplot |