CAP Data Visualization & Reporting

Question 1

Which chart type is most appropriate for displaying the distribution of a continuous variable?

Accepted Answer

Histogram

Answer

A histogram displays the frequency distribution of a continuous variable by grouping values into bins, making it ideal for understanding data distribution.

Question 2

When visualizing the relationship between two continuous variables, which chart type is most commonly used?

Accepted Answer

Scatter plot

Answer

A scatter plot maps individual data points on two axes, making it the standard tool for visualizing correlations or relationships between two continuous variables.

Question 3

A CAP analyst wants to show how a total value breaks down into component parts over time. Which chart type is best suited?

Accepted Answer

Stacked area chart

Answer

A stacked area chart displays part-to-whole relationships over time by stacking the series values, enabling comparison of both individual components and total values.

Question 4

According to data visualization best practices, what is 'data-ink ratio' as defined by Edward Tufte?

Accepted Answer

The proportion of a graphic's ink devoted to displaying data versus non-data elements

Answer

Tufte's data-ink ratio is the fraction of a chart's ink that actually represents data; maximizing it means removing unnecessary decorative elements to improve clarity.

Question 5

Which visualization is most effective for comparing values across multiple categories simultaneously, particularly when the number of categories is large?

Accepted Answer

Horizontal bar chart

Answer

Horizontal bar charts allow easy reading of long category labels and enable accurate length comparisons, making them superior for many-category comparisons.

(CAP) Certified Analytics Professional Practice Test

(CAP) Certified Analytics Professional Practice Test

CAP Data Visualization & Reporting