Data and Analytics Data Visualization 2 — Questions and Answers
Question 1: What does a box plot (box-and-whisker plot) display?
- Mean and standard deviation only
- Distribution summary including median, quartiles, and outliers (Correct answer)
- Frequency of each category
- Correlation between two variables
Correct answer: Distribution summary including median, quartiles, and outliers
A box plot shows the five-number summary (minimum, Q1, median, Q3, maximum) and visually highlights outliers.
Question 2: Which color scale is recommended for sequential data with a meaningful zero point?
- Qualitative palette
- Diverging color scale
- Sequential single-hue scale (Correct answer)
- Rainbow color scale
Correct answer: Sequential single-hue scale
A sequential single-hue scale uses varying lightness of one color to represent ordered data, making magnitude differences clear.
Question 3: What is the main purpose of a dashboard in data analytics?
- To store raw data efficiently
- To provide a real-time overview of key metrics in one view (Correct answer)
- To replace detailed analytical reports
- To automate data collection
Correct answer: To provide a real-time overview of key metrics in one view
A dashboard consolidates key performance indicators and metrics into a single, at-a-glance interface for monitoring business health.
Question 4: What is a KPI in the context of data visualization?
- Key Process Integration
- Key Performance Indicator (Correct answer)
- Kernel Processing Index
- Known Pattern Insight
Correct answer: Key Performance Indicator
A KPI (Key Performance Indicator) is a measurable value that demonstrates how effectively a company is achieving key business objectives.
Question 5: Which type of chart is best for showing data trends over time?
- Pie chart
- Bar chart
- Line chart (Correct answer)
- Scatter plot
Correct answer: Line chart
A line chart connects data points chronologically, making it ideal for visualizing trends, patterns, and changes over time.
Question 6: What is a treemap visualization used for?
- Displaying hierarchical data as nested rectangles sized by value (Correct answer)
- Showing decision tree algorithms
- Mapping geographic data
- Tracking project timelines
Correct answer: Displaying hierarchical data as nested rectangles sized by value
A treemap displays hierarchical data as nested rectangles, where rectangle size represents a quantitative variable.
Data and Analytics Data Visualization 2
What does a box plot (box-and-whisker plot) display?