Bar Diagram Magnitude Representation

In a bar diagram, the magnitude of data is represented by:

Correct Answer Explanation

In a bar diagram, the height or length of the bar reads the magnitude of data.

Key Points:

• Bars are equispaced and equiwidth rectangular bars for each class or category.
• The lower end of the bar touches the base line starting from zero unit.
• Bars can be visually compared by their relative height.
• A single vertical line could serve the same purpose as a bar of the same width.

Why Other Options Are Wrong

• A. Width of bars: Width is arbitrary and unimportant in bar diagrams.
• C. Area of bars: Area matters in histograms, not bar diagrams.
• D. Colour of bars: Colour is used for differentiation, not magnitude.