MCQ Collection
Data Visualization MCQs
Practice Data Visualization questions with answers and explanations.
Choose an option to check your answer.
A.
Unimodal
B.
Bimodal
C.
Uniform
D.
Degenerate
Show Answer
Correct Answer: B. Bimodal
Explanation:
A bimodal distribution has two prominent modes or peaks.
Choose an option to check your answer.
A.
Mean necessarily
B.
Variance
C.
Median necessarily
D.
Sample size
Show Answer
Correct Answer: B. Variance
Explanation:
Identical observations have no deviations from their common mean.
Choose an option to check your answer.
A.
F(a) + F(b)
B.
F(b) - F(a)
C.
F(b) / F(a) in every case
D.
1 - F(a) - F(b)
Show Answer
Correct Answer: B. F(b) - F(a)
Explanation:
F(b) includes probability up to b, while F(a) includes probability up to a.
Choose an option to check your answer.
A.
By replacing all outcomes with their mean
B.
By using the proportion of simulated trials in which the event occurs
C.
By selecting the largest simulated value
D.
By drawing one trial only
Show Answer
Correct Answer: B. By using the proportion of simulated trials in which the event occurs
Explanation:
Repeated simulated trials approximate the event's long-run frequency.
Choose an option to check your answer.
A.
It always has a small numerical value
B.
It requires a very large sample
C.
It is not strongly affected by a small number of extreme values
D.
It can only summarize categorical data
Show Answer
Correct Answer: C. It is not strongly affected by a small number of extreme values
Explanation:
Robust statistics remain reasonably stable under modest contamination or outliers.
Choose an option to check your answer.
A.
To sort the x-axis alphabetically
B.
To calculate covariance
C.
To make regions with many overlapping points appear darker
D.
To remove missing values
Show Answer
Correct Answer: C. To make regions with many overlapping points appear darker
Explanation:
Semi-transparent points accumulate opacity where observations overlap.
Choose an option to check your answer.
A.
A single sharp central peak
B.
A long right tail only
C.
Approximately equal frequency across intervals
D.
Two separated peaks
Show Answer
Correct Answer: C. Approximately equal frequency across intervals
Explanation:
A uniform distribution assigns similar probability across its support.
Choose an option to check your answer.
A.
A histogram whose tallest bar equals the sample size
B.
A chart containing only category names
C.
A histogram scaled so total bar area equals one
D.
A plot with no bin widths
Show Answer
Correct Answer: C. A histogram scaled so total bar area equals one
Explanation:
Density scaling accounts for bin width and normalizes total area to one.
Choose an option to check your answer.
A.
Exactly 90 observations exist
B.
The value is 90% larger than the mean
C.
About 90% of observations are at or below that value
D.
Only 10% of values are below it
Show Answer
Correct Answer: C. About 90% of observations are at or below that value
Explanation:
A percentile is a threshold in the ordered distribution.
Choose an option to check your answer.
A.
The Pareto distribution without parameters
B.
Every bimodal distribution
C.
The normal distribution
D.
An arbitrary empirical distribution
Show Answer
Correct Answer: C. The normal distribution
Explanation:
A normal distribution is specified by a location parameter and a scale parameter.
Choose an option to check your answer.
A.
The arithmetic mean
B.
The standard deviation
C.
The interquartile range
D.
Category frequencies or proportions
Show Answer
Correct Answer: D. Category frequencies or proportions
Explanation:
Nominal categories have no meaningful numeric distances or order.
Choose an option to check your answer.
A.
A grouped bar chart
B.
A dendrogram
C.
A lag plot
D.
An empirical cumulative distribution function plot
Show Answer
Correct Answer: D. An empirical cumulative distribution function plot
Explanation:
An ECDF maps each value to the proportion of observations no greater than it.
