Wize AP Statistics Textbook > Presenting Categorical Data
Segmented Bar Charts
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Segmented Bar Chart (or Stacked Columns)
A segmented bar chart are used to compare two or more categories by using vertical or horizontal bars.
- Typically, the stacked bars show the percentage-of-the-whole of each group and are plotted by the percentage of each value within each group.
- This allows us to easily compare relative differences in the distribution of values of each category.
- Since all the stacked bars add up to 100%, we do not know the frequencies or counts within group by just looking at a segmented bar chart.
- The frequencies may be summarized in a contingency table.
Example:
Indicate three (3) things you observe based on gender and reason to buy skinny jeans:
- Males are more inclined to buy skinny jeans for comfort.
- Females are more inclined to buy skinny jeans for flattery.
- Fashionable is independent of gender.
Use the charts below to answer the questions.
What category are represented by A, B, and C in the segmented bar chart?