Double Bar Graph

Double Bar Graph is a graph used to relate two similar types of quantities. The representation of the double bar graph contains two bars to compare the required quantities. In this article we will explore the double bar graph, double bar graph definition, and double bar graph representation. We will also discuss how to draw double bar graphs and solve some examples related to double bar graphs. Let’s start our learning on the topic “Double Bar Graph.”

Double Bar Graph

A double bar graph, also known as a double-bar chart, is a type of graph that displays two sets of data side by side for easy comparison.

Instead of having one set of bars representing the data, there are two sets, each corresponding to a different category or group. The bars are typically placed next to each other, making it simple to compare the values between the two groups.

Note: Each set of bars in a double bar graph is typically color-coded or labeled to differentiate between the two groups being compared. This makes it easy for viewers to understand the comparison being made.

Double Bar Graph Definition

A double bar graph is a graphical representation of two sets of data on the same graph.

In other words, the representation of comparable quantities using graph with two bars is referred to as double bar graph. It involves using two parallel bars of varying heights to represent and compare data among items based on two categories.

Double Bar Graph Representation

A double bar graph includes two parameters, x and y. The two bars represent the two similar types of any quantity. Below graph represents the double graph.

How to Construct a Double Bar Graph?

The steps to make double bar graph are as follows.

Step 1: Determine the two sets of data you want to compare.

Step 2: Decide on the scale for your graph.

Step 3: Draw two perpendicular axes and label the axes with appropriate titles indicating what each axis represents.

Step 4: Draw bars for each data set and color-code or label the bars to distinguish between the two data sets.

Double Bar Graphs Vs Single Bar Graphs

The below table represents the difference between the double bar graphs and single bar graphs.

Aspect	Double Bar Graphs	Single Bar Graphs
Purpose	Compare two sets of data side by side for easy comparison.	Represent one set of data, typically for categorical data.
Data Representation	Two sets of bars are used, each representing a different dataset.	One set of bars represents the entire dataset.
Comparison	Allows direct comparison between two related datasets.	Suitable for displaying data without direct comparison.
Application	Commonly used when comparing data before and after an intervention, or when comparing data across different groups.	Often used for displaying frequency distributions, percentages, or categorical data.
Examples	Comparing sales figures for two different products over a period.	Showing the distribution of favorite colors in a survey.

Difference between Double Bar Graphs and Line Graphs

The below table represents the difference between the double bar graphs and line graphs.

Aspect	Double Bar Graphs	Line Graphs
Representation	Uses bars to represent data points, comparing two datasets side by side.	Connects data points with lines, showing trends over time or continuous data.
Data Types	Typically used for discrete or categorical data.	Suitable for continuous data, such as time series data.
Comparison	Directly compares two datasets at specific points or categories.	Shows trends or patterns in data over time or across a continuous variable.
Interpretation	Suitable for comparing discrete values or categories at specific points.	Useful for identifying trends, patterns, and relationships in data.
Example Use Cases	Comparing sales figures for two different products in specific months.	Showing the temperature variations throughout the year.

Advantages of Double Bar Graphs

Some advantages of double bar graphs are listed below.

• Double bar graphs are easy to construct.
• It makes the complex comparison of two quantities easy to understand.
• It can compare multiple data sets.

Double Bar Graph Uses

Some of the uses of double bar graph are given below.

• Double bar graphs are used to compare different sets of groups of data.
• Double bar graphs are highly used in businesses, finance for representing data.
• Double bar graphs are used when we require some estimation of the different quantities.

Read More

• Different ways of Data Representation
• Bar Graph
• Data Types in Statistics

Double Bar Graph Solved Examples

Example: Draw the double graph for the below given table.

Student	Marks in Math	Marks in English
A	40	30
B	20	10
C	30	20

Solution:

Let the two parameters be student and marks. Consider student in x- axis and marks in y-axis. The two subject math and English represent the types.

Practice Problems on Double Bar Graph

Problem 1: Draw the double bar graph of below given table.

Person	Saving	Expenditure
X	10000	3000
Y	5000	1000
Z	20000	5000
P	15000	2000

Problem 2: Draw the double bar graph of below given table.

Double Bar Graph – FAQs

What is Double Bar Graph?

The graph with two bars is called double bar graph.

Why are Double Bar Graphs Useful?

Double bar graphs are useful in comparing two grouped quantities.

Who Invented Double Bar Graph?

Double bar graph is invented by William Playfair.

Can Double Bar Graph Contain Parameter of Different Quantities?

A double bar graph can contain two parameters that are measured in the same quantity. The parameters that are measured in different quantities are invalid in double bar graph.