GMAT Data Insights: Graphics Interpretation 3 — Questions and Answers
Question 1: A stacked bar chart shows total quarterly revenue split by product line. To read one product's trend over quarters, you should track:
- The height of that product's segment across bars (Correct answer)
- The total bar height
- The widest bar only
- The chart legend color count
Correct answer: The height of that product's segment across bars
A single product's trend is found by following its own segment's size across each bar.
Question 2: A box plot shows a median line far closer to the bottom of the box than the top. This indicates the data is:
- Right-skewed (Correct answer)
- Left-skewed
- Symmetric
- Uniformly distributed
Correct answer: Right-skewed
A median near the lower quartile with a longer upper portion indicates right (positive) skew.
Question 3: On a scatter plot, one point sits far from the main cluster. This point is best described as a(n):
- Outlier (Correct answer)
- Median
- Trend line
- Mode
Correct answer: Outlier
A point lying far outside the general pattern is an outlier.
Question 4: A bubble chart uses bubble size to show market size. A large bubble at low price and high volume suggests:
- A large market selling many low-priced units (Correct answer)
- A small niche market
- A high-priced luxury segment
- Missing data
Correct answer: A large market selling many low-priced units
Large bubble size means a large market, low x means low price, high y means high volume.
Question 5: A line graph shows two lines that intersect at March. The intersection point means that in March the two quantities were:
- Equal (Correct answer)
- At their maximum
- Both zero
- Negatively correlated
Correct answer: Equal
Where two lines cross, the y-values of both series are equal at that x-value.
Question 6: A percentage bar shows Region A grew from 200 to 250 units. The percentage increase is:
- 25% (Correct answer)
- 20%
- 50%
- 12.5%
Correct answer: 25%
The increase of 50 divided by the original 200 equals 25%.
Question 7: A graph uses a logarithmic y-axis. Equal vertical spacing on this axis represents:
- Equal multiplicative (percentage) changes (Correct answer)
- Equal additive changes
- Random intervals
- Cumulative totals
Correct answer: Equal multiplicative (percentage) changes
On a log scale, equal distances represent equal ratios or percentage changes, not equal absolute amounts.
GMAT Data Insights: Graphics Interpretation 3
A stacked bar chart shows total quarterly revenue split by product line.
To read one product's trend over quarters, you should track: