DAC Data Visualization & Reporting 2

Question 1

Which chart type is most appropriate for showing the correlation between two continuous variables?

Accepted Answer

Scatter plot

Answer

A scatter plot plots two continuous variables against each other to reveal correlation.

Question 2

A dashboard designer wants to reduce cognitive load. Which principle should guide the layout?

Accepted Answer

Follow a clear visual hierarchy

Answer

A clear visual hierarchy guides the eye to the most important information first, reducing cognitive load.

Question 3

What is the primary risk of using a truncated y-axis (not starting at zero) on a bar chart?

Accepted Answer

It exaggerates differences between values

Answer

Truncating the y-axis visually exaggerates small differences and can mislead viewers.

Question 4

In reporting, what does a 'drill-down' capability allow a user to do?

Accepted Answer

Navigate from summary data to more detailed data

Answer

Drill-down lets users move from aggregated summaries into finer levels of detail.

Question 5

Which color consideration is most important for accessibility in dashboards?

Accepted Answer

Ensuring sufficient contrast and colorblind-safe palettes

Answer

Sufficient contrast and colorblind-safe palettes ensure charts are readable by all users.

Data Analytics Certifications (DAC) Practice Test