2.4 - Data Visualization Tools

Question 1

Why are data visualization tools important in analysis?

Answer 1

They help analysts quickly identify patterns, trends, and relationships and communicate insights effectively.

Question 2

Name two popular data visualization tools used in analytics.

Answer 2

Tableau and Power BI

Question 3

What is a dashboard in data visualization?

Answer 3

A collection of charts, graphs, and key metrics displayed together for monitoring and analysis.

Question 4

A ______ chart shows the relationship between two numerical variables.

Answer 4

Scatter

Question 5

A ______ chart is ideal for showing trends over time.

Answer 5

Line

Question 6

Which type of visualization is best for comparing categories?
A) Bar chart
B) Line chart
C) Scatter plot
D) Heat map

Answer 6

A) Bar chart

Question 7

What is the purpose of a slicer or filter in a dashboard?

Answer 7

To allow users to focus on specific subsets of data dynamically.

Question 8

Give one example of how color can be used effectively in visualization.

Answer 8

Examples: highlight trends, indicate categories, show magnitude or intensity.

Question 9

Aggregating data (e.g., summing sales by region) before visualization is called ______.

Answer 9

Data summarization / aggregation

Question 10

Why is interactivity important in dashboards?

Answer 10

It allows users to explore data, drill down into details, and answer specific questions on demand

Question 11

Which of the following is NOT a visualization best practice?
A) Clear labeling
B) Avoid clutter
C) Use excessive colors
D) Highlight key insights

Answer 11

C) Use excessive colors

Question 12

Why should visualizations be designed for the audience?

Answer 12

Different audiences have varying levels of expertise and goals; good design ensures clarity and effective communication.