CBDA Data Visualization & Communication

Question 1

Which chart type is BEST suited for showing the distribution of a single continuous variable in a business data report?

Accepted Answer

Histogram

Answer

A histogram displays the frequency distribution of a continuous variable by grouping values into bins.

Question 2

When presenting findings to non-technical executives, a CBDA analyst should prioritize which of the following?

Accepted Answer

Clear visual narratives tied to business outcomes

Answer

Non-technical audiences need insights framed around business impact, not technical details.

Question 3

A scatter plot with a trend line is MOST useful for communicating which type of relationship?

Accepted Answer

Correlation between two continuous variables

Answer

Scatter plots with trend lines reveal the direction and strength of correlation between two continuous variables.

Question 4

Which color practice is recommended when designing accessible data visualizations for business reports?

Accepted Answer

Use color-blind-safe palettes supplemented by labels or patterns

Answer

Color-blind-safe palettes with supporting labels or patterns ensure all audience members can interpret the visualization.

Question 5

What is 'data ink ratio' as defined by Edward Tufte and why does it matter for CBDA analysts?

Accepted Answer

The proportion of ink used to convey information versus decorative elements

Answer

A high data-ink ratio means most visual elements serve to convey information, reducing chartjunk and improving clarity.

CBDA - Certified Business Data Analyst Practice Test