MCQ Collection
Data Visualization MCQs
Practice Data Visualization questions with answers and explanations.
Choose an option to check your answer.
A.
A guarantee that every future observation lies in the range
B.
A range of plausible values for a population parameter under a stated procedure
C.
The probability that the null hypothesis is true
D.
A list of all sample values
Show Answer
Correct Answer: B. A range of plausible values for a population parameter under a stated procedure
Explanation:
Confidence intervals combine an estimate with its sampling uncertainty.
Choose an option to check your answer.
A.
After seeing which direction gives a smaller p-value
B.
Before analysis, when only one direction is scientifically relevant and the opposite would not support the claim
C.
Whenever the sample is small
D.
Whenever the data are skewed
Show Answer
Correct Answer: B. Before analysis, when only one direction is scientifically relevant and the opposite would not support the claim
Explanation:
Choosing direction after inspecting results inflates false positives.
Choose an option to check your answer.
A.
A rule for choosing chart colors
B.
A rule for measuring dissimilarity between clusters
C.
A test of equality of means
D.
A method for replacing missing values
Show Answer
Correct Answer: B. A rule for measuring dissimilarity between clusters
Explanation:
Linkage determines how pairwise point distances are summarized between groups.
Choose an option to check your answer.
A.
It increases the expected waiting time
B.
It makes waiting time negative
C.
It decreases the expected waiting time
D.
It leaves the distribution unchanged
Show Answer
Correct Answer: C. It decreases the expected waiting time
Explanation:
For an exponential model, the mean waiting time is the reciprocal of the rate.
Choose an option to check your answer.
A.
Estimating a parameter from a sample
B.
Drawing more than one exploratory graph
C.
Using a distributional form or assumptions that do not adequately represent the data-generating process
D.
Reporting a confidence interval
Show Answer
Correct Answer: C. Using a distributional form or assumptions that do not adequately represent the data-generating process
Explanation:
A model is misspecified when key assumptions about shape, dependence, or support are wrong.
Choose an option to check your answer.
A.
Each density height is an exact probability
B.
Density curves apply only to discrete variables
C.
Probabilities correspond to areas under the density, not individual heights
D.
The highest point must have probability one
Show Answer
Correct Answer: C. Probabilities correspond to areas under the density, not individual heights
Explanation:
A density's vertical value has units of probability per unit x.
Choose an option to check your answer.
A.
A tight increasing straight line
B.
A tight decreasing straight line
C.
A symmetric U-shaped relationship
D.
Two identical variables
Show Answer
Correct Answer: C. A symmetric U-shaped relationship
Explanation:
Positive and negative linear tendencies in a symmetric curve can cancel.
Choose an option to check your answer.
A.
It becomes wider
B.
Its center becomes zero
C.
It becomes narrower
D.
Its confidence level becomes 100% automatically
Show Answer
Correct Answer: C. It becomes narrower
Explanation:
Larger samples usually reduce the standard error of an estimate.
Choose an option to check your answer.
A.
Assuming every variable is uniform
B.
Deleting half the sample repeatedly
C.
Repeated resampling from the observed data with replacement
D.
Drawing only from a known population
Show Answer
Correct Answer: C. Repeated resampling from the observed data with replacement
Explanation:
Bootstrap samples approximate the estimator's sampling distribution empirically.
Choose an option to check your answer.
A.
Forcing every cluster to have equal size
B.
Using only cluster means
C.
Chaining through sequences of nearby observations
D.
Ignoring all pairwise distances
Show Answer
Correct Answer: C. Chaining through sequences of nearby observations
Explanation:
Single linkage uses the closest pair of points between clusters.
Choose an option to check your answer.
A.
The full range
B.
The standard error
C.
The number of categories
D.
The interquartile range
Show Answer
Correct Answer: D. The interquartile range
Explanation:
The lower and upper edges of the box are Q1 and Q3.
Choose an option to check your answer.
A.
Histograms can never use a vertical axis
B.
Bar charts require numeric category names
C.
Histograms display only percentages
D.
Bar-chart bars are separated, while histogram bins usually touch
Show Answer
Correct Answer: D. Bar-chart bars are separated, while histogram bins usually touch
Explanation:
Histogram intervals form a continuous numeric scale, so adjacent bins touch.
