DA0-002 Data Analysis Practice Question
A data analyst is cleaning a dataset and finds that a numeric field has several missing values. The variable is normally distributed. Which imputation method is most appropriate?
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
✓
Mean imputation
For normally distributed data, mean imputation is common and preserves 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.
- ✗
Median imputation
Why it's wrong here
Median is better for skewed data.
- ✓
Mean imputation
Why this is correct
Mean is appropriate for symmetric distributions.
- ✗
Mode imputation
Why it's wrong here
Mode is for categorical data.
- ✗
Forward-fill
Why it's wrong here
Forward-fill is for time series.
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Written by Johnson Ajibi, MSc IT Security
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This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.