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.

TABLE 12.6: Graphs to use for most situations
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: