CompTIA Data+ (DA0-002)VisualizationMedium
A marketing team is analyzing the effectiveness of different advertising channels (e.g., social media, email, print) in generating leads. They want to see the proportion of leads each channel contributes to the total over the last quarter, specifically for each of their three main product lines. The visualization should allow for easy comparison of channel effectiveness across product lines. Which chart type is MOST suitable?
- AScatter Plot
- BStacked Bar Chart
- CHistogram
- DLine Chart
Show answer & explanationAnswer & explanation
Correct answer: B. Stacked Bar Chart
A stacked bar chart is excellent for showing part-to-whole relationships and comparing these compositions across different categories (product lines). Each bar would represent a product line, stacked segments showing the proportion of leads from each advertising channel.
Why the other options are wrong
- A. Scatter plots show relationships between two numerical variables and are not suitable for displaying proportions of categorical data.
- C. Histograms show the distribution of a single numerical variable, not the proportions of multiple categories.
- D. Line charts are for trends over time, not for comparing proportions of categorical data across groups.
Stacked Bar Chart
A bar chart that displays multiple data series on top of each other, where each segment of the bar represents a part of the total, allowing for comparison of composition across different categories.
- Shows part-to-whole relationships.
- Compares the composition of different groups.
- Each bar represents a total, divided into segments by sub-categories.
Memory trick: Stacked Bars Show Parts, Comparing Across Groups with Hearts!