12.11 Summary
To summarise one variable, these graphs can be used:
- For one quantitative variable: Histogram; stem-and-leaf; dot chart.
- For one qualitative variable: Bar chart; pie chart; dot chart.
For two variables, the graphs shown in Table 12.6 can be used. In general, the ‘response’ variable is on the vertical axis.
| Explanatory: Qualitative | Explanatory: Quantitative | |
|---|---|---|
| Response: Qualitative | Stacked bar chart; side-by-side bar chart | Boxplot; back-to-back stem; 2-D dot chart |
| Response: Quantitative | Boxplot; back-to-back stem; s2-D dot chart | Scatterplot |
The following short video may help explain some of these concepts: