What is a subdivided bar diagram?

Draw a subdivided bar diagram from the following data?

Stream

• Number of students

• 2009
• 2010
• 2011

Arts

• 50
• 70
• 75

Science

• 200
• 250
• 300

Commerce

• 100
• 120
• 130

A subdivided bar diagram is a graphical representation used to display the composition of different categories within a whole. Each bar represents a total value, and it is divided into segments that show the contribution of each category to that total. This type of diagram is particularly useful for comparing parts of a whole across different groups or over time. To illustrate this concept, let's take the data you provided regarding the number of students in different streams over three years: Arts, Science, and Commerce. We will create a subdivided bar diagram based on this data.

Data Overview

Here’s the data we have:

• Arts: 2009 - 50, 2010 - 70, 2011 - 75
• Science: 2009 - 200, 2010 - 250, 2011 - 300
• Commerce: 2009 - 100, 2010 - 120, 2011 - 130

Calculating Total Students Each Year

First, we need to calculate the total number of students for each year:

• 2009: 50 (Arts) + 200 (Science) + 100 (Commerce) = 350
• 2010: 70 (Arts) + 250 (Science) + 120 (Commerce) = 440
• 2011: 75 (Arts) + 300 (Science) + 130 (Commerce) = 505

Creating the Subdivided Bar Diagram

Now, let’s visualize this data in a subdivided bar diagram. Each bar will represent a year, and the segments within each bar will represent the number of students in each stream.

Steps to Draw the Diagram

1. Draw three vertical bars, one for each year (2009, 2010, 2011).
2. For each bar, divide it into segments according to the number of students in each stream.
3. Label each segment with the stream name and the number of students.

Example Representation

While I can't draw the diagram here, I can describe how it would look:

• The bar for 2009 would have:
• 50 units for Arts
• 200 units for Science
• 100 units for Commerce
• The bar for 2010 would show:
• 70 units for Arts
• 250 units for Science
• 120 units for Commerce
• The bar for 2011 would display:
• 75 units for Arts
• 300 units for Science
• 130 units for Commerce

Interpreting the Diagram

Once you have drawn the subdivided bar diagram, you can easily compare the number of students in each stream across the three years. For instance, you might observe that the Science stream consistently has the highest number of students, while Arts has the lowest, but it shows a gradual increase over the years.

This visual representation not only makes it easier to understand the data but also helps in identifying trends and making comparisons at a glance. By using a subdivided bar diagram, you can effectively communicate the composition of student enrollment across different streams over the specified years.