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

Histograms divide continuous data into bins and display frequency counts, making them ideal for showing distributions.

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

Coined by Edward Tufte, the data-ink ratio measures the share of a graphic's ink devoted to presenting data rather than decoration.

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

Non-technical audiences engage best when results are framed around business outcomes before diving into technical details.

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

Dual-axis charts can create misleading visual correlations by manipulating independent scales to make trends appear related.

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

ColorBrewer palettes are specifically designed and tested for perceptual uniformity across common types of color vision deficiency.

MS-DS Master of Data science Practice Test