MCQ Collection
Data Visualization MCQs
Practice Data Visualization questions with answers and explanations.
Choose an option to check your answer.
A.
The labels determine the sample size
B.
Equal visual distances represent ratios rather than equal absolute differences
C.
Logarithms remove all outliers
D.
The axis becomes categorical
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Correct Answer: B. Equal visual distances represent ratios rather than equal absolute differences
Explanation:
Viewers may otherwise interpret spacing as linear.
Choose an option to check your answer.
A.
Small values are more extreme
B.
Large values extend farther from the center than small values
C.
All observations are equal
D.
There are no high observations
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Correct Answer: B. Large values extend farther from the center than small values
Explanation:
A right tail stretches toward larger values.
Choose an option to check your answer.
A.
The probability that the variable equals its mean
B.
The probability that the random variable is less than or equal to x
C.
The density only at x
D.
The number of observations above x
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Correct Answer: B. The probability that the random variable is less than or equal to x
Explanation:
The CDF accumulates probability from the lower tail through x.
Choose an option to check your answer.
A.
dunif() only
B.
runif()
C.
punif() only
D.
qunif() only
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Correct Answer: B. runif()
Explanation:
Functions beginning with r generate random variates in R's distribution naming convention.
Choose an option to check your answer.
A.
The plot title
B.
The font family
C.
An off-center median and unequal whisker lengths
D.
The number of axis ticks only
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Correct Answer: C. An off-center median and unequal whisker lengths
Explanation:
Asymmetry in the box or whiskers reflects unequal spread on the two sides.
Choose an option to check your answer.
A.
It removes the category labels
B.
It forces all values to be equal
C.
The line implies continuity and meaningful transitions between categories
D.
It prevents the use of color
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Correct Answer: C. The line implies continuity and meaningful transitions between categories
Explanation:
A line suggests that intermediate positions and sequential movement have meaning.
Choose an option to check your answer.
A.
A pie chart with a trend line
B.
A table without values
C.
A box plot overlaid with jittered points
D.
A map with no geographic variable
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Correct Answer: C. A box plot overlaid with jittered points
Explanation:
The box plot summarizes center and spread, while points reveal sample size and detail.
Choose an option to check your answer.
A.
Multiplication by zero
B.
Alphabetical sorting
C.
A logarithmic transformation
D.
Replacing all values with ranks only
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Correct Answer: C. A logarithmic transformation
Explanation:
The logarithm compresses large positive values more than small ones.
Choose an option to check your answer.
A.
It must be symmetric
B.
It must have constant slope
C.
It is nondecreasing
D.
It must be negative for small x
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Correct Answer: C. It is nondecreasing
Explanation:
Accumulated probability cannot decrease when the threshold increases.
Choose an option to check your answer.
A.
Random samples
B.
Cumulative probabilities
C.
Density or probability mass values
D.
Quantiles
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Correct Answer: C. Density or probability mass values
Explanation:
The d-prefix evaluates a density for continuous distributions or mass for discrete ones.
Choose an option to check your answer.
A.
The mean
B.
The range midpoint
C.
The maximum
D.
The median
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Correct Answer: D. The median
Explanation:
The extreme value 100 strongly pulls the mean upward.
Choose an option to check your answer.
A.
A single-variable histogram
B.
A pie chart
C.
A one-column frequency table only
D.
A scatter plot
Show Answer
Correct Answer: D. A scatter plot
Explanation:
Each point in a scatter plot represents a paired observation.
