DAC Data Visualization & Reporting 3

Question 1

When should you use a line chart instead of a bar chart?

Accepted Answer

To show trends over continuous time

Answer

To compare discrete categories

Answer

To display parts of a whole

Answer

To rank items alphabetically

Question 2

What is 'data-ink ratio' as described by Edward Tufte?

Accepted Answer

The proportion of ink used to display actual data versus decoration

Answer

The ratio of printer ink to paper cost

Answer

The number of colors per chart

Answer

The pixel density of a screen

Question 3

A stakeholder wants to compare the composition of total sales across five regions over four quarters. Which chart works best?

Accepted Answer

Stacked bar chart by quarter

Answer

Single pie chart

Answer

Scatter plot

Answer

Gauge chart

Question 4

What is the main purpose of adding filters to an interactive report?

Accepted Answer

To let users focus on specific subsets of data

Answer

To increase file size

Answer

To hide the data source

Answer

To slow down queries

Question 5

Which practice improves the storytelling quality of a report?

Accepted Answer

Guiding the reader with annotations and a logical flow

Answer

Presenting charts without any titles or labels

Answer

Using random chart orderings

Answer

Removing all context and comparisons

Question 6

A dual-axis chart is most useful when you need to:

Accepted Answer

Show two measures with different scales together

Answer

Display a single metric

Answer

Replace a data table

Answer

Show geographic distribution

Question 7

What does 'small multiples' refer to in data visualization?

Accepted Answer

A series of similar charts using the same scale for easy comparison

Answer

Using tiny fonts

Answer

Rounding numbers down

Answer

A single very small chart