MS-DS Master of Data science FREE MS-DS Master of Data science Data Visualization and Communication Questions and Answers 2

Question 1

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

Accepted Answer

Histogram

Answer

Pie chart

Answer

Scatter plot

Answer

Tree map

Question 2

What does the term 'data-ink ratio' refer to in data visualization?

Accepted Answer

The proportion of ink used to display actual data versus non-data elements

Answer

The resolution quality of printed charts

Answer

The contrast ratio between text and background

Answer

The number of colors used in a visualization

Question 3

When presenting analysis results to non-technical stakeholders, which approach is most effective?

Accepted Answer

Lead with key findings and business impact before showing methodology

Answer

Present all statistical tests and p-values first

Answer

Use as many chart types as possible to demonstrate rigor

Answer

Include raw data tables for transparency

Question 4

What is the primary risk of using a dual-axis chart?

Accepted Answer

It can mislead viewers by implying a correlation between unrelated variables

Answer

It always requires logarithmic scaling

Answer

It cannot display more than two data series

Answer

It violates accessibility guidelines

Question 5

Which color palette strategy ensures a visualization is accessible to colorblind viewers?

Accepted Answer

Using a colorblind-safe palette such as those from ColorBrewer

Answer

Using only red and green to maximize contrast

Answer

Relying solely on color saturation differences

Answer

Using as many distinct hues as possible

Question 6

In a dashboard designed for monitoring real-time KPIs, which visualization element helps users quickly identify metrics that need attention?

Accepted Answer

Conditional formatting with threshold-based color alerts

Answer

Detailed footnotes explaining each metric

Answer

Animated transitions between data points

Answer

Three-dimensional bar charts