Data Science Data Visualization and Communication 5

Question 1

Which visualization is most appropriate for displaying hierarchical part-to-whole data with nested categories?

Accepted Answer

Treemap

Answer

A treemap uses nested rectangles sized by value to show hierarchical part-to-whole relationships.

Question 2

What is the main advantage of small multiples?

Accepted Answer

They allow easy comparison across categories using a shared scale and layout

Answer

Small multiples repeat the same chart with consistent scales, enabling quick cross-category comparison.

Question 3

Which is a key reason to choose a horizontal bar chart over vertical bars?

Accepted Answer

Long category labels are easier to read horizontally

Answer

Horizontal bars give room for long category labels without rotating or truncating text.

Question 4

What does a choropleth map encode?

Accepted Answer

Values across geographic regions using color shading

Answer

A choropleth shades geographic areas by a data value, mapping quantities to regions.

Question 5

When designing an interactive dashboard, what is a best practice for the default view?

Accepted Answer

Present the most important summary first with drill-down available

Answer

Showing key summaries upfront with optional drill-down balances clarity and depth.

Data Science Practice Test