Question

mosaic plot
a mosaic plot is yet another variation of a bar graph that shows the relationship between two categorical variables. it clearly shows the proportion of observations for the values of one variable, as well as the relative proportion to the whole.
what does the height of each segment represent?
what does the width of each segment represent?

Explanation:

In a mosaic - plot, height shows relative frequency within subgroup, width shows proportion of subgroup to whole.

Answer:

Height: Relative frequency within subgroup.
Width: Proportion of subgroup to whole.