DA0-002 Data Analysis Practice Question
A dataset has missing values in the 'age' column. The distribution of age is approximately normal with few outliers. 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 reasonable 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.
- ✓
Mean imputation
Why this is correct
Mean imputation is appropriate for normal distribution.
- ✗
Forward-fill
Why it's wrong here
Forward-fill uses previous value, not suitable for random missing.
- ✗
Delete all rows with missing data
Why it's wrong here
Deletion may cause loss of data.
- ✗
Mode imputation
Why it's wrong here
Mode is for categorical data.
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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.