Data Science Data Visualization and Communication 2

Question 1

Which chart type is most appropriate for showing the part-to-whole composition of a single category at one point in time?

Accepted Answer

Pie chart

Answer

Line chart

Answer

Scatter plot

Answer

Box plot

Question 2

You want to compare the distribution and outliers of salaries across five departments. Which visualization is best?

Accepted Answer

Box plot

Answer

Stacked bar chart

Answer

Pie chart

Answer

Single line chart

Question 3

Which color palette is most appropriate for a diverging metric like temperature anomaly centered on zero?

Accepted Answer

Diverging two-hue palette

Answer

Sequential single-hue palette

Answer

Qualitative categorical palette

Answer

Random rainbow palette

Question 4

What is the main reason to avoid truncating the y-axis (not starting at zero) on a bar chart?

Accepted Answer

It can exaggerate differences and mislead viewers

Answer

It makes the chart load slower

Answer

It removes the legend

Answer

It changes the underlying data

Question 5

Which visualization best reveals the correlation between two continuous variables across many observations?

Accepted Answer

Scatter plot

Answer

Pie chart

Answer

Stacked area chart

Answer

Donut chart

Question 6

When presenting results to a non-technical executive audience, what should you lead with?

Accepted Answer

The key takeaway and its business impact

Answer

The raw model coefficients

Answer

The data cleaning steps

Answer

The full code repository

Question 7

What does the principle of 'data-ink ratio' (Tufte) recommend?

Accepted Answer

Maximize the proportion of ink devoted to displaying actual data

Answer

Add more decorative gridlines and 3D effects

Answer

Maximize ink used for non-data elements

Answer

Use as many colors as possible