Bar graph

Definition

A bar graph is a visual representation of data using rectangular bars to compare different categories or groups. The lengths of the bars are proportional to the values they represent.

5 Must Know Facts For Your Next Test

1. Bar graphs are useful for comparing discrete data across categories.
2. Bars can be plotted either vertically or horizontally.
3. Each bar represents a single category of data, making it easy to see differences and trends.
4. Bar graphs can display both frequency counts and percentages.
5. They are commonly used in business statistics for visualizing survey results, sales data, and other categorical information.

Review Questions

• What is the primary purpose of a bar graph?
• How does the length of a bar in a bar graph relate to the data it represents?
• In what scenarios would you use a bar graph instead of another type of chart?

Related terms

Histogram:

A type of bar chart that represents the frequency distribution of continuous data with adjacent bars.

Pie Chart:

A circular chart divided into sectors, each representing a proportion of the whole.

Frequency Distribution: $\text{A table that displays the frequency of various outcomes in a sample.}$