The mosaic plot is a graphical representation of the two-way frequency table or Contingency Table. A mosaic plot is divided into rectangles, so that the vertical length of each rectangle is proportional to the proportions of the Y variable in each level of the X variable. The mosaic plot was introduced by Hartigan and Kleiner (1981) and refined by Friendly (1994).
To produce the plot shown in Figure 6.99, follow the instructions in Example of Contingency Analysis.
Figure 6.99 Example of a Mosaic Plot
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The proportions on the x-axis represent the number of observations for each level of the X variable, which is country.
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The proportions on the y-axis at right represent the overall proportions of Small, Medium, and Large cars for the combined levels (American, European, and Japanese).
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The scale of the y-axis at left shows the response probability, with the whole axis being a probability of one (representing the total sample).
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