MCQ Collection
Data Visualization MCQs
Practice Data Visualization questions with answers and explanations.
Choose an option to check your answer.
A.
To merge all groups into one average
B.
To eliminate legends from every chart
C.
To convert numeric values to text
D.
To create separate but consistently designed plots for subsets of the data
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Correct Answer: D. To create separate but consistently designed plots for subsets of the data
Explanation:
Facets reduce overlap and allow subgroup patterns to be compared.
Choose an option to check your answer.
A.
A category bar chart
B.
A pie chart
C.
A frequency table of names
D.
A normal Q-Q plot
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Correct Answer: D. A normal Q-Q plot
Explanation:
Heavy tails create systematic departures at the ends of a normal Q-Q plot.
Choose an option to check your answer.
A.
A continuous area curve only
B.
A survival curve without axes
C.
A geographic map
D.
Separated bars or vertical spikes at discrete outcomes
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Correct Answer: D. Separated bars or vertical spikes at discrete outcomes
Explanation:
A PMF is defined at distinct values rather than across continuous intervals.
Choose an option to check your answer.
A.
Every selected item is permanently removed
B.
Only missing items can be sampled
C.
The sample must equal the population size
D.
A selected item can be chosen again in the same sample
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Correct Answer: D. A selected item can be chosen again in the same sample
Explanation:
After each draw, the item is returned to the sampling pool.
Choose an option to check your answer.
A.
Q3 + 1.5 × IQR
B.
Mean + IQR
C.
Maximum + standard deviation
D.
Q1 + 1.5 × median
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Correct Answer: A. Q3 + 1.5 × IQR
Explanation:
The upper fence is Q3 plus 1.5 times the interquartile range.
Choose an option to check your answer.
A.
A sorted bar chart of proportions
B.
A three-dimensional pie chart
C.
A scatter plot
D.
A box plot
Show Answer
Correct Answer: A. A sorted bar chart of proportions
Explanation:
Aligned bar lengths are easier to compare accurately than angles or three-dimensional slices.
Choose an option to check your answer.
A.
When positive values span several orders of magnitude
B.
When the data contain only names
C.
When all values are identical
D.
When zero must appear at equal visual intervals
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Correct Answer: A. When positive values span several orders of magnitude
Explanation:
A logarithmic scale compresses large values and expands smaller positive values.
Choose an option to check your answer.
A.
The data may contain distinct subgroups or a recording discontinuity
B.
The mean is necessarily zero
C.
The sample must be normally distributed
D.
The graph cannot represent numeric data
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Correct Answer: A. The data may contain distinct subgroups or a recording discontinuity
Explanation:
Gaps can reflect real subpopulations, thresholds, censoring, or data errors.
Choose an option to check your answer.
A.
1/6
B.
1/4
C.
4/6
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Correct Answer: A. 1/6
Explanation:
Each of the six faces is equally likely for a fair die.
Choose an option to check your answer.
A.
rnorm(100)
B.
runif(0, 100)
C.
pnorm(100)
D.
qnorm(100)
Show Answer
Correct Answer: A. rnorm(100)
Explanation:
rnorm() generates normal random variates, and the first argument is the number requested.
Choose an option to check your answer.
A.
They show the exact value of every observation
B.
They allow distributions of several groups to be compared compactly
C.
They prove group means are significantly different
D.
They display time order automatically
Show Answer
Correct Answer: B. They allow distributions of several groups to be compared compactly
Explanation:
Aligned box plots reveal differences in medians, spreads, and potential outliers.
Choose an option to check your answer.
A.
When categories have no natural order
B.
When observations are ordered, especially across time
C.
When displaying one static nominal count
D.
When showing a single median only
Show Answer
Correct Answer: B. When observations are ordered, especially across time
Explanation:
Lines emphasize continuity and changes along an ordered axis.
