DA0-002 Data Analysis Practice Question
Which THREE of the following are examples of descriptive statistics? (Select THREE.)
⚠ Common exam trap
CompTIA often tests the distinction between descriptive and inferential statistics by including p-values and regression coefficients as distractors, exploiting the common misconception that any numerical summary of data is descriptive.
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
✓
Correlation coefficient
The correlation coefficient (A) is a descriptive statistic because it quantifies the strength and direction of a linear relationship between two variables using a single number (ranging from -1 to +1) without making inferences about a larger population. It simply describes the observed data's association, which is the core function of descriptive statistics.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Correlation coefficient
Why this is correct
Correlation coefficient describes the strength of a linear relationship, a descriptive statistic.
- ✓
Mean
Why this is correct
Mean is a measure of central tendency, a descriptive statistic.
- ✗
P-value
Why it's wrong here
P-value is used in hypothesis testing, an inferential statistic.
- ✗
Regression coefficient
Why it's wrong here
Regression coefficient is used in modeling, an inferential statistic.
- ✓
Standard deviation
Why this is correct
Standard deviation measures dispersion, a descriptive statistic.
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