DA0-002 Data Analysis Practice Question
A data analyst is reviewing a dataset containing house prices. The mean price is $350,000 and the median is $280,000. Which of the following best describes the distribution of house prices?
⚠ Common exam trap
DA0-002 often tests the mean-vs-median relationship: candidates who forget that mean > median indicates right skew (not left) pick the wrong direction.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The distribution is right-skewed.
When the mean ($350,000) is greater than the median ($280,000), the distribution is right-skewed (positively skewed). In a right-skewed distribution, a long tail of high values pulls the mean upward above the median. This is common with house prices, where a few very expensive homes inflate the mean.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The distribution is right-skewed.
Why this is correct
A mean above the median indicates right-skew, where high-value outliers pull the mean upward while the median stays resistant. This satisfies the stem's constraint of mean ($350,000) exceeding median ($280,000), confirming a positively skewed distribution of house prices.
- ✗
The distribution is symmetric.
Why it's wrong here
Symmetry requires the mean and median to coincide, but here they differ by $70,000. It is tempting because symmetric distributions are the default assumption for many statistical tests, and it would be correct if the mean and median were equal.
- ✗
The distribution is left-skewed.
Why it's wrong here
Left-skewed would have mean < median.
- ✗
The distribution is bimodal.
Why it's wrong here
Bimodality concerns the number of peaks in the distribution, which the mean and median cannot reveal. It is tempting because house prices often cluster into market segments, and it would be correct if a histogram showed two distinct modes.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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