Data Science Data Visualization and Communication 4

Question 1

Which storytelling structure is commonly used to frame a data presentation?

Accepted Answer

Situation, complication, resolution

Answer

A situation-complication-resolution arc gives data narratives a logical, persuasive flow.

Question 2

When should you use a stacked area chart instead of multiple line charts?

Accepted Answer

When emphasizing cumulative totals and part-to-whole over time

Answer

Stacked area charts emphasize how components accumulate into a total across time.

Question 3

What is 'chart junk'?

Accepted Answer

Non-essential decorative elements that distract from the data

Answer

Chart junk refers to unnecessary decoration that adds no information and distracts viewers.

Question 4

Which approach best directs a viewer's attention to the single most important data point in a chart?

Accepted Answer

Use a preattentive cue like a contrasting highlight color on that point

Answer

Highlighting one element with a contrasting color leverages preattentive processing to draw the eye.

Question 5

Why is a log scale sometimes used on an axis?

Accepted Answer

To better display data spanning several orders of magnitude

Answer

A log scale compresses wide-ranging values so patterns across magnitudes are visible.

Data Science Practice Test