MCQ Collection
Data Visualization MCQs
Practice Data Visualization questions with answers and explanations.
Choose an option to check your answer.
A.
Only the series mean over time
B.
The hierarchy of cluster merges
C.
The distribution of category names
D.
Estimated autocorrelation across multiple lags
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Correct Answer: D. Estimated autocorrelation across multiple lags
Explanation:
An ACF plot displays temporal dependence at lag 1, lag 2, and beyond.
Choose an option to check your answer.
A.
A rule for installing an R package
B.
A test for equal variances
C.
A method for generating random seeds
D.
A rule linking a data variable to a visual property
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Correct Answer: D. A rule linking a data variable to a visual property
Explanation:
Aesthetics include x-position, y-position, color, size, shape, and transparency.
Choose an option to check your answer.
A.
Equal visual spacing may incorrectly imply equal time gaps
B.
The values become nonnumeric
C.
The line chart automatically sorts by size
D.
The sample variance becomes zero
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Correct Answer: A. Equal visual spacing may incorrectly imply equal time gaps
Explanation:
A time axis should reflect actual elapsed time, not merely record order.
Choose an option to check your answer.
A.
The type of graphical mark used to represent observations or summaries
B.
The data file's directory
C.
The significance level
D.
The random-number distribution
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Correct Answer: A. The type of graphical mark used to represent observations or summaries
Explanation:
Geoms include points, lines, bars, box plots, and smooth curves.
Choose an option to check your answer.
A.
Only historical maximum values
B.
Prediction intervals showing uncertainty
C.
A pie chart of residuals
D.
A single p-value without context
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Correct Answer: B. Prediction intervals showing uncertainty
Explanation:
Future outcomes are uncertain even when a central forecast is available.
Choose an option to check your answer.
A.
To calculate confidence intervals
B.
To create panels for subsets defined by categorical variables
C.
To merge all categories into one value
D.
To remove the plot axes
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Correct Answer: B. To create panels for subsets defined by categorical variables
Explanation:
Faceting repeats a plot structure across groups.
Choose an option to check your answer.
A.
Chronological splitting guarantees normal residuals
B.
Random splitting changes variable names
C.
Random splitting can leak future information into model training
D.
Time series contain no independent values
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Correct Answer: C. Random splitting can leak future information into model training
Explanation:
Forecasting should mimic using past data to predict later periods.
Choose an option to check your answer.
A.
The raw variable values
B.
The fitted distribution parameters
C.
Non-data display elements such as fonts, grid lines, and backgrounds
D.
The number of observations
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Correct Answer: C. Non-data display elements such as fonts, grid lines, and backgrounds
Explanation:
Themes style the presentation without changing the underlying statistical mapping.
Choose an option to check your answer.
A.
Only a continuous predictor's mean
B.
The number of histogram bins
C.
A cluster centroid
D.
Time until an event occurs
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Correct Answer: D. Time until an event occurs
Explanation:
Survival analysis models durations such as time to failure, recovery, or death.
Choose an option to check your answer.
A.
Inside removes color, while outside creates a new variable
B.
Inside changes sample size, while outside changes the mean
C.
There is no difference
D.
Inside maps color to data, while outside assigns one fixed color
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Correct Answer: D. Inside maps color to data, while outside assigns one fixed color
Explanation:
Mapped aesthetics vary across observations and usually generate a legend.
Choose an option to check your answer.
A.
The exact event time is not fully observed for some subjects
B.
The event occurs at time zero for everyone
C.
All observations are removed
D.
The response is measured without error
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Correct Answer: A. The exact event time is not fully observed for some subjects
Explanation:
Censoring preserves partial information about event timing.
Choose an option to check your answer.
A.
The analytical workflow remains transparent and reproducible
B.
Manual edits always improve accuracy
C.
Code prevents all missing values
D.
Plots cannot use transformed data
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Correct Answer: A. The analytical workflow remains transparent and reproducible
Explanation:
Scripted transformations can be inspected, rerun, and corrected.
