Data and Analytics Data Visualization

Question 1

Which chart type is best for showing the distribution of a single continuous variable?

Accepted Answer

Histogram

Answer

A histogram displays the frequency distribution of continuous data by grouping values into bins.

Question 2

What does a scatter plot primarily show?

Accepted Answer

Relationship between two numeric variables

Answer

A scatter plot displays the correlation or relationship between two continuous numeric variables using dots.

Question 3

Which visualization tool is most commonly used for business intelligence dashboards in the US?

Accepted Answer

Tableau

Answer

Tableau is the leading BI dashboard tool in the US enterprise market, known for its drag-and-drop interface and interactive dashboards.

Question 4

What is a heat map used to represent?

Accepted Answer

Magnitude of values across two dimensions using color intensity

Answer

A heat map encodes data values as color intensity across a matrix, making it easy to spot patterns and outliers.

Question 5

Which principle of data visualization does Edward Tufte's 'data-ink ratio' emphasize?

Accepted Answer

Maximizing the proportion of ink used to display data

Answer

Tufte's data-ink ratio advocates removing all non-essential chart elements to maximize the proportion of ink conveying actual data.

Data and Analytics Practice Test