DATA VISUALIZATION EXPLORING AND
EXPLAINING WITH DATA
COMPREHENSIVE EXAM SCRIPT VERIFIED
QUESTIONS AND SOLUTIONS GRADED
APLUS
●● What are the advantages of data visualization?
Answer: Easy access to complex data, interactivity, and visualization of
patterns and relationships in the data.
●● What are the disadvantages of data visualization?
Answer: Representation of biased or inaccurate information, correlation
that does not represent causation, and loss of desired messaging.
●● What is the purpose of a scatter chart?
Answer: To visualize the correlation between two numerical variables,
helping identify trends or patterns.
●● How do scatter charts represent data?
Answer: Each point represents an observation, displaying individual data
points rather than aggregated values.
, ●● What is a histogram used for?
Answer: To visualize how data is spread across different ranges (bins)
and to spot patterns like skewness or normality.
●● What distinguishes a histogram from a bar chart?
Answer: Histograms group continuous data into intervals (bins) rather
than displaying exact values.
●● What does a box plot display?
Answer: The median, quartiles, and potential outliers, making it easy to
see distribution differences.
●● Why are box plots effective for comparing multiple groups?
Answer: They can display multiple box plots side by side for
comparison, such as exam scores across different classes.
●● What is the impact of truncating the y-axis in a graph?
Answer: It can make differences in data seem much larger than they are.
●● What is a pictogram?
Answer: Data represented by a graphic or image instead of a number,
often using bar or line chart structures.
EXPLAINING WITH DATA
COMPREHENSIVE EXAM SCRIPT VERIFIED
QUESTIONS AND SOLUTIONS GRADED
APLUS
●● What are the advantages of data visualization?
Answer: Easy access to complex data, interactivity, and visualization of
patterns and relationships in the data.
●● What are the disadvantages of data visualization?
Answer: Representation of biased or inaccurate information, correlation
that does not represent causation, and loss of desired messaging.
●● What is the purpose of a scatter chart?
Answer: To visualize the correlation between two numerical variables,
helping identify trends or patterns.
●● How do scatter charts represent data?
Answer: Each point represents an observation, displaying individual data
points rather than aggregated values.
, ●● What is a histogram used for?
Answer: To visualize how data is spread across different ranges (bins)
and to spot patterns like skewness or normality.
●● What distinguishes a histogram from a bar chart?
Answer: Histograms group continuous data into intervals (bins) rather
than displaying exact values.
●● What does a box plot display?
Answer: The median, quartiles, and potential outliers, making it easy to
see distribution differences.
●● Why are box plots effective for comparing multiple groups?
Answer: They can display multiple box plots side by side for
comparison, such as exam scores across different classes.
●● What is the impact of truncating the y-axis in a graph?
Answer: It can make differences in data seem much larger than they are.
●● What is a pictogram?
Answer: Data represented by a graphic or image instead of a number,
often using bar or line chart structures.
