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

Question 1

A data scientist is preparing a presentation for a non-technical executive audience to explain the results of a complex customer segmentation model.
Which of the following approaches is most effective for this type of communication?

Accepted Answer

Focus on the business impact and key takeaways, using simple, clear visuals and avoiding technical jargon.

Answer

Provide the raw model output, including cluster centroids and silhouette scores, to ensure full transparency.

Answer

Explain the mathematical foundations of the clustering algorithm, starting with the distance metrics used.

Answer

Present a detailed walkthrough of the model's architecture, including the hyperparameter tuning process and feature engineering steps.

Question 2

An analyst wants to visualize the relationship between two continuous variables: 'Advertising Spend' and 'Website Traffic'. Which type of chart is the most appropriate choice to illustrate the potential correlation between these two metrics?

Accepted Answer

Scatter Plot

Answer

Histogram

Answer

Bar Chart

Answer

Box Plot

Question 3

A manager presents a bar chart showing quarterly sales. To make recent growth appear more dramatic, the y-axis, which represents sales in millions, starts at $10 million instead of $0. This practice is a common form of a misleading visualization known as:

Accepted Answer

Truncating the y-axis

Answer

Using an improper color scale

Answer

Cherry-picking data points

Answer

Creating a dual-axis chart

Question 4

A dashboard designer places three related Key Performance Indicators (KPIs) close together within a single bordered box, separating them from other, less related metrics. Which Gestalt principle of perception is primarily being used to signal that these KPIs form a group?

Accepted Answer

Proximity

Answer

Similarity

Answer

Continuity

Answer

Figure/Ground

Question 5

According to Edward Tufte's principles of graphical excellence, which of the following best defines the 'data-ink ratio'?

Accepted Answer

The proportion of a graphic's ink devoted to the non-redundant display of data-information.

Answer

The total number of data points divided by the total ink used in the graphic.

Answer

The amount of ink used to create visual embellishments and decorations that are not part of the data.

Answer

The ratio of ink used for the chart's frame and gridlines compared to the ink used for the data points.

Question 6

A data scientist is creating a choropleth map to visualize a state's average household income, which is a continuous variable ranging from low to high. Which type of color palette is most appropriate for this visualization to ensure intuitive interpretation?

Accepted Answer

Sequential

Answer

Categorical

Answer

Diverging

Answer

Analogous

A data scientist is preparing a presentation for a non-technical executive audience to explain the results of a complex customer segmentation model.Which of the following approaches is most effective for this type of communication?

A data scientist is preparing a presentation for a non-technical executive audience to explain the results of a complex customer segmentation model.
Which of the following approaches is most effective for this type of communication?