Data Visualization & Interpretation Flashcards
7 cards from real DMC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Data Visualization & Interpretation flashcards as text
Which chart type is best suited for showing the distribution of a single continuous variable?
Answer: Histogram
A histogram bins continuous values and shows their frequency distribution.
In a box plot, what does the box itself represent?
Answer: The interquartile range (Q1 to Q3)
The box spans the first to third quartile, containing the middle 50% of the data.
A scatter plot shows points tightly clustered along a downward-sloping line. What does this suggest?
Answer: Strong negative correlation
Points along a downward line indicate that one variable falls as the other rises.
Why is a truncated y-axis on a bar chart considered misleading?
Answer: It exaggerates differences between bar lengths
Bar length encodes magnitude, so a non-zero baseline visually exaggerates differences.
Which visualization best shows correlations among many numeric variables at once?
Answer: Correlation matrix heatmap
A heatmap of the correlation matrix displays all pairwise coefficients with color intensity.
What is the main purpose of a Q-Q plot?
Answer: Comparing two distributions or checking normality
A Q-Q plot compares sample quantiles with theoretical quantiles to assess distribution fit.
Which color scheme is most appropriate for data that diverges around a meaningful midpoint, such as profit and loss?
Answer: Diverging
Diverging palettes emphasize deviation in two directions from a neutral midpoint.
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